文档库 最新最全的文档下载
当前位置:文档库 › 英语语法和用法

英语语法和用法

英语语法和用法
英语语法和用法

★清华大学★英语系学生测试使用。专为中小学生英语量身定做。

官方网站:https://www.wendangku.net/doc/053981331.html,/

清华大学英语教授研究组提供

一、词类:

1、动词:行为动词、be动词、情态动词。

(1)行为动词

原形、+s/es、+ed、+ing,具体判断方法如下:

(2)be动词

a、Am--was Is --was Are--were 口诀:我用am, 你用are, is用在他她它,所有复数全用are。

b、肯定和否定句

I am (not) from London. He /She is(not) a teacher. My hair is(not) long. Her eyes are(not) small.

c、一般疑问句Am I ...? Yes, you are. No, you aren‘t. Are you/they...? Yes,we/ they are. No,we/ they aren’t. Is the cat fat? Yes, it is. No, it isn‘t.

is、am、are为一类,一般用于一般现在时、现在进行时和一般将来时中。

was和were为另一类,一般用于一般过去时。

(3)情态动词

can、must、should、would、may。情态动词后动词总是用原形。(不受其他任何条件影响)

2、名词

这里强调两点:不可数名词都默认为单数,所以总是用is或者was。

如何加后缀:

a.一般情况下,直接加-s,如:book-books, bag-bags, cat-cats, bed-beds b.以s. x. sh. ch结尾,加-es,如:bus-buses, box-boxes, brush-brushes, watch-watches

c.以“辅音字母+y”结尾,变y为i, 再加-es,如:family-families, strawberry-strawberries

d.以“f或fe”结尾,变f或fe为v, 再加-es,如:knife-knives

e.不规则名词复数: man-men, woman-women, policeman-policemen, policewoman-policewomen, mouse-mice child-children

foot-feet ,.tooth-teeth fish-fish, people-people, Chinese-Chinese, Japanese-Japanese

3、形容词(包括副词)

形容词表示某一事物或的特征,副词表示某一动作的特征。

形容词和副词只有两种形式:原形和+er。

未作比较的情况下就用原形,比较时就+er。

两个重要特征:as......as中间一定用原形,有than的时候一定+er。

4、人称代词和物主代词

人称代词

物主代词

单数

复数

单数

复数

主格

宾格

主格

宾格

形容词性(短)名词性(长)形容词性(短)名词性(长)第一人称

I

me

we

us

my

mine

our

ours

第二人称

you

you

you your yours your yours 第三人称he

him they them his

his

theirs

she

her

her

hers

it

it

its

its

人称代词:

有主格和宾格之分。

一般动词前用主格,动词后用宾格。

物主代词:

有两类:形容词性物主代词(短的)和名词性物主代词(长的)

一般看后面有没有名词,如有,就用形容词性物主代词(短的);如无,就用名词性物主代词(长的)。

5、数量词

我们学过两类:基数词和序数词。基数用于表示数量多少,而基数词用于表示次序,常在日期中出现。序数词的前面一般都加the。

6、冠词

有a、an、the。a和an的区别:an用于元音音素(一般就是元音字母aeiou)前,a用于辅音音素前。

二、否定句:

be动词(am、is、are、was、were)+not、

情态动词(can、must、should)+ not、

助动词(do、does、did) + not

如何将一个肯定的陈述句改为否定句:

1、看句中有无be动词,如有,直接在be动词后+ not。

2、看句中有无情态动词,如有,直接在情态动词后+ not。

3、如上述二者都没有,就应用助动词+ not。分四个步骤:

(1)肯定陈述句中本来是没有助动词的,要加上去,位置在主语(某人或某物)后,动词前。

(2)确定助动词用do、does还是did,根据句中动词,动词是原形的助动词就用do,动词是第三人称单数的助动词就用does,动词用过去式的助动词就有did。

(3)在助动词后加not。

(4)原句中动词假如发生变化就要恢复成原形。

强调一点,有some的要考虑是否要用any。

三、一般疑问句。

如何将一个肯定的陈述句改为否定句:

1、看句中有无be动词,如有,把be动词提到句首即可。

2、看句中有无情态动词,如有,把情态动词提到句首即可。

3、如上述二者都没有,就应把助动提到句首。分四个步骤:

(1)肯定陈述句中本来是没有助动词的,要加上去,位置在主语(某人或某物)后,动词前。

(2)确定助动词用do、does还是did,根据句中动词,动词是原形的助动词就用do,动词是第三人称单数的助动词就用does,动词用过去式的助动词就有did。

(3)把助动词后提到句首。

(4)原句中动词假如发生变化就要恢复成原形。

强调一点,有some的要考虑是否要用any。

四、特殊疑问句。

表示疑问,有疑问词(在开头),回答有很多种可能。常用疑问词:

疑问词

意思

用法

When

什么时间

问时间

What time

什么时间

问具体时间,如几点钟

Who

问人Whose 谁的问主人Where 在哪里问地点Which 哪一个问选择Why 为什么问原因What

问东西、事物What colour 什么颜色

问颜色

What about 。。。。怎么样问意见

What day

星期几

问星期几

What date

什么日期

问日期

What for

为何目的

问目的

How

。。。。怎样

问情况

How old

多大年纪

问年纪

How many

多少数量(可数名词)

问数量

How much

多少钱;多少数量(不可数名词)问多少钱或数量(不可数)

How about

。。。。怎么样

问意见

How often

多久

问频率

How long

多长时间

问时间长度

How far

多远

问多远;多长距离

五、祈使句

表示请求或命令别人做某事或不要做某事。

肯定祈使句一定是以动词原形开头(有时有please),否定的祈使句一定是don’t加动词原形开头(有时有please)。

把祈使句改为否定句只需在动词前加don‘t即可。

六、时态

1、一般现在时

(1)一般现在时中的be动词:

一般用原形:am is are

am用于第一人称单数(I);is用于第三人称单数(he she it和其他人名或称谓,如:Ben his sister等);are用于第二人称单数(you)和所有复数(包括第一人称复数we、第二人称复数you;第三人称复数they和其他复数,如the children 、 his parents等)。

(2)一般现在时中的动词:

第一种情况:主语是第三人称单数(he she it 和其他,如Helen 、

her cousin 等),动词后一般加s或es。

第二种情况:主语不是第三人称单数,动词都用原形。

(4)一般现在时判断依据(如何判断一个句子是一般现在时):

△be动词是am、is、are

△动词用原形或加s、es

△没有时间状语或有usually、often、everyday、sometimes等不是具体的时间

2、一般过去时

(1)一般过去时中的be动词:

一般用过去式:was were

was用于第一人称单数(I)和第三人称单数(he she it和其他人名或称谓,如:Ben 、 his sister等);were用于第二人称单数(you)和所有复数(包括第一人称复数we、第二人称复数you;第三人称复数they和其他复数,如

the children 、 his parents等)。

(2)一般过去时中的动词:

一般只有一种情况:+ed

这里强调一点,和一般现在时不同的是这里不管主语是第几人称,也不管是单数和复数都加ed。

(4)一般过去时判断依据(如何判断一个句子是一般过去时):

△be动词是was、were △动词加ed

△有表示过去的时间状语

现在学过的常用的表示过去的时间状语有:

just now a moment ago yesterday last week last night

last weekend last year last month three days

ago two weeks ago

five years ago this morning

3、一般将来时

(1)构成形式:

Be going to +动词原形, will + 动词原形

(2)一般将来时表示动作即将发生或某人打算做某事。

(3)句中往往有tomorrow、soon、next week等词。

4、现在进行时

(1)构成形式:

Be动词+动词的ing形式

这里强调一点,两者缺少其中任何一种都不可以构成现在进行时。

(2)现在进行时表示动作正在进行或事情正在发生。

(3)有用的依据:

一个句子中既有be动词,又有动词,且动词加了ing ←→ 该句是现在进行时(4)句中往往有now、look、listen等词。

动词过去式、现在分词的不规则变化:be 是--was, were--being

begin 开始--began--beginning

build 建筑--built--building

buy 买--bought--buying

can 能--could--无

come 来--came--coming

copy 拷贝--copied--copying

do 做--did--doing

draw 画--drew--drawing

drink 喝--drank--drinking

drive 驾车--drove--driving

eat 吃--ate--eating

feel 感觉--felt--feeling

find 找寻--found--finding

fly飞--flew--flying

forget 忘记--forgot--forgetting

get 得到--got--getting

give 给予--gave--giving

go 去--went--going

grow 成长--grew--growing

have 有--had--having

hear 听--heard--hearing

keep 保持--kept--keeping

know 知道--knew--knowing

learn学习-learnt, learned--learning let 让--let--letting

make 做--made--making

may 可以--might--无

mean 意思--meant-meaning

meet 见面--met--meeting must 必须--must--无

put 放--put--putting

read 读--read--reading

ride 骑--rode--riding

ring 响--rang--ringing

run 跑--ran--running

say 说--said--saying

see 看见--saw--seeing

sing 唱歌--sang--singing

sit 坐--sat--sitting

sleep 睡觉--slept--sleeping speak 讲话--spoke--speaking spend 花钱--spent--spending stand 站立--stood--standing

sweep 打扫--swept--sweeping

swim 游泳--swam--swimming

take 拿到--took--taking

teach 教--taught--teaching

tell 讲述--told--telling

think 思考--thought--thinking

will 意愿--would--无

write 写--wrote--writi

★清华大学★英语系学生测试使用。专为中小学生英语量身定做。官方网站:https://www.wendangku.net/doc/053981331.html,/

清华大学英语教授研究组提供

一课时:be动词

主讲与人称代词的搭配

1、基本形式:am、are、is

(1)am

第一人称I+am (注意:“I”无论何时都要大写,不管位于句首还是句中)

例:I am a beautiful girl. I am twenty.

英语语法大全之状语 7

10.条件状语从句 If it rains,I shall(or will,can,may)not go out.(I do not know whether it will rain or not.) If it should rain,I shall(or will,can,may)not go out.(I do not know whether it will rain or not.) If it should rain,I should(or would,could,might)not go out.(I don't think it will rain.) If it rained,I should(or would,could,might)not go out.(I know it will not rain.) If it had rained,I should(or would,could,might)not have gone out.(I know it did not rain.) If it rained,he will(or can,may)not have gone out.(I do not know whether it rained or not.)If he only(or but)works harder,he will succeed.(He doesn't have to do anything else in order to succeed.) If you only care to flatter your boss,you will be promoted. If and when I die,you must take good care of your-self. He may resign if he so desires(or chooses,wills,purposes). I may do anything if I intend(or wish,like,will)it. He is nothing if(he is)not(=absolutely,decidedly)a cheat. Your guess is nothing if(it is)not correct. Ask that gentleman if gentleman(不加冠词)he be.(倒装语序) His conscience forbade him to do so,if conscience he had. I have succeeded in persuading a drunkard,if succeed one can. Let me know your reason,if reason there is. I have told her ten times,if I have done once(=exactly). The mountain is5650feet,if an inch(=exactly). 1

初中英语语法——动词的时态

动词的时态 一、考点解读 今天我们复习动词的时态,英语的时态是同学们学习英语的难点,在各地的中考题目中许多题型都会有对于动词时态的考查。出现较多的是在单选,完形填空,及其在第二卷中出现的根据汉语意思填词的题目,还包括翻译句子,书面表达。可以说中考题目中大部分都会涉及到动词的时态。既是难点也是重点。在今天的专题中我们复习初中阶段需要掌握的八个时态。 1.一般现在时 2.现在进行时 3.一般过去时 4.过去进行时 5.一般将来时 6.过去将来时 7.现在完成时 8.过去完成时 二、专题梳理 初中阶段所学的英语的时态有8种。英语的时态有很强的表达能力,能使句子的意思明确,能显示细微的差异,能使句子生动逼真。但它们不是相当灵活,在不同的时间中,要用不同的形式,这是与中文大不相同的地方。 1.一般现在时:一般现在时是描述经常性、反复性的动作、性质或状态的时态。 (1)一般现在时的时间状语通常有: ①often ②usually ③always

④seldom ⑤sometimes ⑥every+时间 ⑦次数+时间 ⑧on+时间 ⑨in+时间 ⑩没有时间,但表示客观存在的事实 (2)一般现在时动词的形式主要用动词原形表示,但如果主语是单数第三人称时,则在动词后加s或es,变成否定句和疑问句时,又将s、es去掉,还为原形。 ①be动词的一般现在时的构成 否定式和疑问否定式如下表所示: ②其他实义动词的一般现在时的构成

其他实义动词一般现在时的构成如下 表所示(以动词work为例) 特别提示: have(has)在表示“有”时,否定形式为haven’t(hasn’t)或have not(has not),变为疑问句时可直接把have(has)放在句首也可借助于助动词do(does)。当不表示“有”的意思时,其否定句和疑问句只能加助动词do(does)构成。 e.g.Has she any experience in teaching piano lessons?(√) Does she have any experience in teaching piano lessons?(√) 她有教钢琴的经验吗? Had you a good time going hiking yesterday?(×) Did you have a good time going hiking yesterday?(√) 你昨天徒步旅行玩得开心吗?

高中英语语法(时态和语态)

高中英语语法(时态和语态) 一.动词的时态 时态是谓语动词所表示的动作或情况发生时间的各种形式。英语动词有16种时态,但是常见的只有九种:一般现在时、一般过去时、一般将来时、现在进行时、过去进行时、现在完成时、过去完成时、过去将来时、现在完成进行时。 (一)一般现在时(do / does) 1.具体用法 1) 表示经常性或习惯性动作 We always care for each other and help each other. 我们总是互相关心互相帮助。 He goes to school every day. 2)表示现在的特征或状态 He is very happy. Do you sing? ----A little. 3)表示普遍真理 Light travels faster than sound. 光速比声速快。 Actions speak louder than words. 行动胜过言语。 * 常与一般现在时态连用的词或短语主要有:often, usually, sometimes, every day, every morning/afternoon, on Sundays/weekends等等。 I often go to the cinema on Sundays. 我经常星期天去看电影。 He goes to work early every day. 他每天上班很早。 (二)一般过去时( did ) (1)表示过去某一特定时间所发生的、可完成的动作或状态,常与表示确切过去时间的词、短语或从句连用。例如: We went to the pictures last night and saw a very interesting film. (2)表示过去习惯性动作。例如: He always went to class last. I used to do my homework in the library. (三)一般将来时( will / shall do) 1)表示将来打算进行或期待发生的动作或状态。例如: I shall graduate next year. 2)一般将来时有时可以表示一种倾向或习惯性动作。如 Crops will die without water. You won’t succeed with out their support. 3) 几种替代形式: *be going to +v在口语中广泛使用,表示准备做或将发生的事情。例如: I'm going to buy a house when we've saved enough money. *be to +v表示计划安排要做的事,具有"必要"的强制性意义。例如: I am to play tennis this afternoon. *be about to +v表示即将发生的事情。例如: He was about to start. *be due to +v表示预先确定了的事,必定发生的事。例如: The train is due to depart in ten minutes. 5)少数动词如:begin, come, leave, go, arrive, start, stop, return, open, close等的一般现在时可用来表示将来的动作。(多用来表示按计划事先安排好即将发生的动作,句中通常还有一个表示将来的时间状语)。例如: The meeting begins at seven.

英语语法学习:’S的用法

英语语法学习:’S的用法 :在单词后加S表示复数形式外,还可以表达什么意思呢?下面我们一起看看这篇《’S的用法》。 一、's一般表示人或动物等的所有关系,用于名词复数的词尾形式为s’ the teachers’ help 老师们的帮助; children's books 儿童读物。 二、表示店铺、教堂的名称或某人的家时,名词所有格后面的名词常不出现 1.We met him at the tailor's yesterday.我们昨天在裁缝店遇见了他。 2.He visited St.Paul’s.他访问了圣保罗教堂。 三、注意名词所有格后的名词由于前面已经提到而被省略的情况,同时也注意of后单独使用名词所有格的情况 This book isn’t mine, but Ms.Ye's.这本书不是我的而是叶女士的。 四、注意“名词所有格+-ing”构成复合结构的用法 I have not heard of Engineer Hua's going abroad for higher studies. 我未听说华工程师出国深造。 五、’s表示时间、空间、度量的关系

Today's newspapers今天的报纸; the earth's crust 地壳。 六、无生命的名词一般用of来表示所有格关系,但目前也有用’s表示所有格的情况 The moon's gravity is much weaker than the earth's.月球引力比地球引力弱得多。 【注】日前在英语中用of短语仍比用’s更多些。因此,使用本结构时应谨慎为宜。 七、’s表示字母、数字、略语等的复数 ABC's of science 科学的基础; in the early1900’s 在二十世纪初期。 八、’s是us,has,is的缩语 1.Let's make an adjustment.让我们调整一下。 2.It's much better than we thought. 这比我们想的好多了。 九、注意易混淆的几个句子意思 1.This is Mr.Fang's picture.这是方先生的照片。 2.This is a picture of Mr.Fang.这是方先生本人的照片。 3.This is a picture of Mr. Fang's. 这是方先生所持有的照片中的一张。 4.This picture is Mr.Fang's.这张照片是方先生的。

高三年级英语语法-虚拟语气全总结

虚拟语气在非真实条件句中 ①错综时间条件句: 当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时,被称为错综时间条件句,动词的形式要根据它表示的时间作出相应的调整。如: If you had followed my advice just now, you would be better now. If you had studied hard before, you would be a college student now. ②if省略句 在条件句中可以省略if, 把were, had, should提到句首,变成倒装句式。否定句时not留在原来位置不变。如: If I were at school again, I would study harder. →Were I at school again, I would study harder. 如果我还有上学的机会,我会更加努力学习。 If you had come earlier, you would catch the bus. →Had you come earlier, you would catch the bus. 如果你来得早点,你就能赶上公共汽车。 If it should rain tomorrow, we would not go climbing. →Should it rain tomorrow, we would not go climbing. 如果明天下雨的话,我们就不能登山去了。 ③用介词代替条件状语从句 常用的介词有with, without, but for。如: What would you do with a million dollars? (=if you had a million dollars)

高中英语语法_状语从句练习30题及详解

1. Tim is in good shape physically ________ he does n't get much exercise. A. if B. even though C. uni ess D. as long as 2. The school rules state that no child shall be allowed out of the school duri ng the day, _____ accompa nied by an adult. A. once B. whe n C. if D. uni ess 3. ___ you may have, you should gather your courage to face the challenge. A. However a serious problem B. What a serious problem C. However serious a problem D. What serious a problem 4. Because of the heavy traffic , it was already time for lunch break ________ she got to her office . A . si nee B .that C . when D . until - 】Joh n thinks it won 't be long he is ready for his new job. A. whe n B. after C. before D. since 6. Today, we will begin we stopped yesterday so that no point will be left out. A. whe n B. where C. how D. what 7. She had just finished her homework her mother asked her to practice playing the piano yesterday. A. whe n B. while C. after D. since 8. My pare nts don ' t mind what job I do I am happy. A. even though B. as soon as C. as long as D. as though 9. You can ' t borrow books from the school library ______ you get your student card. A. before B. if C. while D. as 10. All the dishes in this menu, ______ otherwise stated, will serve two to three people. A. as B. if C. though D. unl ess 11. Because of the financial crisis, days are gone __ local 5-star hotels charged 6,000 yuan for one night. A. if B. whe n C. which D. since 12. ___ u nemployment and crime are high, it can be assumed that the latter is due to the former. 13. — Did you return Fred ' s call? 16. __________ in the fields on a March after noon , he could feel the warmth of spri ng. A . To walk B. Walking C. Walked D. Having walked 17. Na ncy enjoyed herself so much she visited her friends in Sydney last year. A.that B.which C.whe n D.where 18. You ' d better not leave the medici ne kids can get at it. A.eve n if B.which C.where D.so that 19. I won ' t call you , ________________ something unexpected happens. A.u nless B.whether C.because D.while 20. — Where' s that report? A. Before B. Where C. U nless D. Until —I didn ' t need to I ' ll see him tomorrow. A. though B. unl ess 14. _I ' m sorry you ' ve been waiting so long , Brian gets back. A. before B. since C. till C. whe n D. because but it ' ll still be some time _____ D. after 15. We ll have a picnic in the park this Sun day ____ ____ it rains or it ' s very cold. A.si nee B. if C. unl ess D. un til

初中英语语法八大时态总结

初中英语语法八大时态 1.结构 肯定句式: 主语+动词原形/动词的第三人称单数+其他 否定句式: 主语+(助动词)don't/doesn't +动词原形+其他 一般疑问句式: Do/Does+主语+动词原形+其他 简略回答: (肯)Yes,主语+do/does (否)No,主语+do/does not 缩写形式: don't = do not doesn't = does not 例句:He often goes swimming in summer. I usually leave home for school at 7 every morning. 2.用法 1)表示经常的、习惯性的动作或存在的状态,常与表示频度的副词连用。 常用的频度副词有:always、often、usually、seldom、never、sometimes, every week (day, year, month…), once a week, on Sundays.频度副词在句中通常放在行为动词之前,系动词、助动词之后。 例如: He often goes swimming in summer. I usually leave home for school at 7 every morning. 2)表示主语具备的性格、特征和能力等。 例如:All my family love football . My sister is always ready to help others . Ann writes good English but does not speak well. 3)表示客观真理、客观存在、自然现象。 例如:The earth moves around the sun. Shanghai lies in the east of China. 4)表示按计划或安排好的,或将要发生的动作,可用一般现在时表将来。 但只限于start,begin,leave,go,come,arrive,return,take place等。 例如:The train leaves at six tomorrow morning. He comes back tonight. 5)在复合句中,当主句是一般将来时,时间或条件状语从句的谓语动词只能用一般现在时来表示将来要发生的动作。 例如:I'll tell him the news when he comes back. If you take the job , they will talk with you in greater details. 1.结构 肯定句式: 主语+动词过去式+其他 否定句式: 主语+(助动词)didn’t +动词原形+其他 一般疑问句式: Did+主语+动词原形+其他

高考英语语法专题复习动词时态和语态

高考英语语法专题复习动词时态和语态 Document number:PBGCG-0857-BTDO-0089-PTT1998

高考英语语法复习专题:动词时态和语态 一、考点聚焦 1、动词时态考查要点简述 (1)一般现在时考点分析 ①表示客观事实或普通真理(不受时态限制) The geography teacher told us the earth moves around the sun. Water boils at 100o C. ②表示现状、性质、状态时多用系动词或状态动词;表示经常或习惯性的动作,多用 动作动词,且常与表频率的时间状语连用。 Ice feels cold. We always care for each other and help each other. ③表示知觉、态度、感情、某种抽象的关系或概念的词常用一般现在时:see、hear、smell、taste、feel、notice、agree、believe、like、hate、want、think、belong seem等。如: I know what you mean. Smith owns a car and a house. All the students here belong to Middle School. ④在时间、条件状语从句中常用一般现在时代替将来时。但要注意由if 引导的条件状语从句中可以用shall或will表“意愿”,但不表示时态。 If you will accept my invitation and come to our party, my family will be pleased.如果你愿意接受并参加我们的舞会,我的家人会非常高兴。 ⑤少数用于表示起止的动词如come、go、leave、arrive、fly、return、start、begin、pen、close、end、stop等常用一般现在时代替将来时,表示一 个按规定、计划或安排要发生的动作。当be表示根据时间或事先安排,肯定会出现的状态,只用一般现在时。 The shop closes at 11:00 . every day. Tomorrow is Wednesday.

英语语法和用法

★清华大学★英语系学生测试使用。专为中小学生英语量身定做。 官方网站:https://www.wendangku.net/doc/053981331.html,/ 清华大学英语教授研究组提供 一、词类: 1、动词:行为动词、be动词、情态动词。 (1)行为动词 原形、+s/es、+ed、+ing,具体判断方法如下: (2)be动词 a、Am--was Is --was Are--were 口诀:我用am, 你用are, is用在他她它,所有复数全用are。 b、肯定和否定句 I am (not) from London. He /She is(not) a teacher. My hair is(not) long. Her eyes are(not) small. c、一般疑问句Am I ...? Yes, you are. No, you aren‘t. Are you/they...? Yes,we/ they are. No,we/ they aren’t. Is the cat fat? Yes, it is. No, it isn‘t. is、am、are为一类,一般用于一般现在时、现在进行时和一般将来时中。

was和were为另一类,一般用于一般过去时。 (3)情态动词 can、must、should、would、may。情态动词后动词总是用原形。(不受其他任何条件影响) 2、名词 这里强调两点:不可数名词都默认为单数,所以总是用is或者was。 如何加后缀: a.一般情况下,直接加-s,如:book-books, bag-bags, cat-cats, bed-beds b.以s. x. sh. ch结尾,加-es,如:bus-buses, box-boxes, brush-brushes, watch-watches c.以“辅音字母+y”结尾,变y为i, 再加-es,如:family-families, strawberry-strawberries d.以“f或fe”结尾,变f或fe为v, 再加-es,如:knife-knives e.不规则名词复数: man-men, woman-women, policeman-policemen, policewoman-policewomen, mouse-mice child-children foot-feet ,.tooth-teeth fish-fish, people-people, Chinese-Chinese, Japanese-Japanese

高中英语语法(虚拟语气)

Unit13虚拟语气专题讲解 【知识要点】 语气(mood)是一种动词形式,用以表示说话者的意图或态度。 英语有三种语气: *直陈语气(indicative mood)---- 事实 France lies to the east of England. *祈使语气(imperative mood)---- 请求、命令 Make yourself at home. *虚拟语气(subjunctive mood) If there were no air and water , we should not be able to live on the earth. 虚拟语气表示说话人的一种主观愿望或假想,所说的是一个条件而不一定是事实,或与事实相反。 一. 虚拟语气在if条件状语从句中的用法 假设类型条件从句谓语 动词形式 主语谓语 动词形式 与现在事实相反动词的过去式(be用were而不用was) should/ would /could/ might+动词原形 与过去事实相反had + 过去分词 should/ would/could /might + have+过去分词 与将来事实相反1.should+动词原形 2.动词过去式 3.were to+动词原形 should/ would/ could/ might +动词原形 1. 在错综条件句子中,虚拟条件从句和主句动作发生的时间不一致,因此,主句和从句的谓语动词应根据所指的时间选用适当的虚拟语气形式。 1)If I were you,I wouldn't have missed the film last night. 2)If he had followed the doctor's advice,he would recover already.(从句与过去事实相反,主句与现在事实相反。) 2、在if虚拟条件句中,有时可把连词省去,采用倒装语序把谓语动词were或助动词did,had,should 移到句 首构成非真实条件从句的另一种句型,其意思不变。 1)Had we time to spare,we would be glad to go to the park. 2)Were it not for the discovery of electricity,the modern world would experience great inconvenience. 3、有时假设的情况不用if引导虚拟条件从句来表述,而用介词(如without, but for等)引出的短语、分词 (如supposing等)引出的短语、并列连词(如or,otherwise,but,though等)、由动词suppose引出的祈使句或通过上下文的意思来表达。此时句中谓语动词仍采用虚拟语气的相应形式。 1)But for your advice,I would not be able to do this work. 2)Victor obviously doesn't know what's happened,otherwise he wouldn't have made such a stupid remark.。

初中英语语法状语从句-精华版

状语从句 状语从句用来修饰主句中的动词,副词和形容词的从句叫状语从句。根据其含义状语从句可分为时间状语从句,地点状语从句,条件状语从句,原因状语从句,结果状语从句,比较状语从句,目的状语从句,让步状语从句。 1. 时间状语从句 (1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。例如: When while as 的区别It was raining hard(rain hard 下大雨)when got to school yesterday. While he was doing his homework, the telephone rang. As he walked along(沿着走)the lake, he sang happily. He had learned a little Chinese before he came to China. After he finished middle school, he went to work in a factory. (2)在时间状语从句里,通常不用将来时态,用现在时态表示将来的动作或状态。例如: I’ll ring you up as soon as I get to New York. I will tell him everything when he comes back. He won’t believe it until he sees it with his own eyes. (3)在带有till或until引导的时间状语从句的主从复合句里 如果主句用肯定式,其含义是“一直到……时”,谓语动词只能用延续性动词。 如果主句用否定式,其含义是“直到……才……”, “在……以前不……”, 谓语动词可用瞬间动词。 例如: The young man read till the light went out(熄灭). Let’s wait until the rain stops. We won’t start until Bob comes. Don’t get off(从下来)until the bus stops. 【。固定组合里from morning till night,till/until是不能替换的,】 2. 条件状语从句 (1)条件状语从句通常由if, unless引导。例如: What shall we do if it snows tomorrow? Don’t leave the building unless I tell you to. (2)在条件状语从句里,谓语动词通常用现在时态表示将来的动作或状态。例如: I’ll help you with your English if am free tomorrow. He won’t be late unless he is ill. (3)“祈使句+ and (or)+ 陈述句” 在意思上相当于一个带有条件状语从句的复合句。例如: Hurry up, or you’ll be late. =If you don’t hurry up, you’ll be late. Study hard and you will pass the exam. =If you study hard, you will pass the exam. 3. 原因状语从句 (1)原因状语从句通常由because, since, as引导。例如: He didn’t come to school because he was ill. As it is raining, we shall not (不得;不应该)go the zoo. Since you can’t answer the question, I’ll ask someone else.

初中英语语法动词时态

初中英语语法总结 ( 动词的时态) 11.1 一般现在时的用法 1)经常性或习惯性的动作,常与表示频度的时间状语连用。时间状语:every…, sometimes, at…, on Sunday。例如: I leave home for school at 7 every morning. 每天早上我七点离开家。 2)客观真理,客观存在,科学事实。例如: The earth moves around the sun. 地球绕太阳转动。 Shanghai lies in the east of China. 上海位于中国东部。 3)表示格言或警句。例如: Pride goes before a fall. 骄者必败。 注意:此用法如果出现在宾语从句中,即使主句是过去时,从句谓语也要用一般现在时。例:Columbus proved that the earth is round. 哥伦布证实了地球是圆的。 4)现在时刻的状态、能力、性格、个性。例如: I don't want so much. 我不要那么多。 Ann writes good English but does not speak well. 安英语写得不错,讲的可不行。 比较:Now I put the sugar in the cup. 把糖放入杯子。 I am doing my homework now. 我正在做功课。 第一句用一般现在时,用于操作演示或指导说明的示范性动作,表示言行的瞬间动作。第二句中的now是进行时的标志,表示正在进行的动作的客观状况,所以后句用一般现在时。11.2 一般过去时的用法 1)在确定的过去时间里所发生的动作或存在的状态。例如:时间状语有:yesterday, last week, an hour ago, the other day, in 1982等。例如: Where did you go just now? 刚才你上哪儿去了? 2)表示在过去一段时间内,经常性或习惯性的动作。例如: When I was a child, I often played football in the street. 我是个孩子的时候,常在马路上踢足球。 Whenever the Browns went during their visit, they were given a warm welcome.

高考英语语法填空——动词的时态和语态专题

高考英语——动词的时态和语态(专项练习题) 单句语法填空 1.We can achieve a lot when we learn to let our differences unite,rather than ________ (divide) us. 2.Silk ________(become) one of the primary goods traded along the Silk Road by about 100 BC. 3.When the time came to make the final decision for a course,I decided to apply for the one that ________(reflect) my interest. 4.More efforts,as reported,________(make)in the years ahead to accelerate the supply-side structural reform. 5.Dashan,who ________ (learn)crosstalk,the Chinese comedic tradition,for decades,wants to mix it up with the Western stand-up tradition. 6.When walking down the street,I came across David,whom I ________ (see) for years. 7.Two years ago,while Cathy ________ (watch) the Olympics,a dream came into her sweet little head—to be a swimmer. 8.Jack ________(work)in the lab when the power cut occurred. 9.I ________(read)half of the English novel,and I’ll try to finish it at the weekend. 10.The students have been working hard on their lessons and their efforts ________ (reward)success in the end. 11.—Excuse me,which movie are you waiting for? —The new Star Wars.We ________ (wait)here for more than two hours. 12.Secret codes keep messages private.Banks,companies,and government agencies use secret codes in doing business,especially when information ________ (send)by computer. 13.People in this area are in fact French citizens because it________(be) a colony of the French Republic since 1946.

英语语法:and的六点的用法

英语语法:and的六点的用法 and的六点用法 (1) 表示联合,意为“和”、“又”、“而且”: We were cold and hungry. 我们饥寒交迫。 I woke up and got out of bed. 我醒了就起床了。 He played the piano and she sang. 他弹钢琴,她唱歌。 (2) 有时用于连接两个相同的词语,表示连续性: The train ran faster and faster. 火车开得越来越快。 We waited for hours and hours. 我们一直等了好几个小时。 The boys laughed and laughed. 这些孩子笑个不停。 【注】但有时连接两个相同名词表示不同的质量和种类: There are dictionaries and dictionaries. 词典很多,有好有坏。 Don’t worry—there are rules and rules. 别担心——规则与规则不一样。 (3) 在口语中用在 come, go, run, stay, stop, try 等之后表示目的,大致相当于不定式符号 to: Come and have tea with me. 过来跟我一起喝杯茶。 We ought to stop and think. 我们应该停下来想一想。 (4) 有时用在祈使句后,表示结果,意为“那么”: Work hard and you’ll succeed. 努力干吧,你会成功的。

Arrive late once more and you’re fired. 你再迟一次,你 就会被开除。 比较:If you work hard, you’ll succeed. 如果你努力干, 你会成功的。 (5) 有时表示对比(有类似but的意思): He is rich, and (yet) leads a modest life. 他很富有,但 却过着朴素的生活。 Robert is secretive and David is candid. 罗伯特深藏不露,而戴维则有啥说啥。 (6) 用在 good, nice, fine 等之后,表示“很”,“挺”: It’s nice and cool under the tree. 这树下很凉快。 The book is good and expensive. 这本书很贵。

(完整)高中英语语法虚拟语气讲解

高中英语语法讲解--虚拟语气 1. 语气的定义和种类 (1)语气的定义 语气是动词的一种形式,它表示说话人对某一行为或事情的看法和态度。 (2)语气的种类 A. 陈述语气 表示动作或状态是现实的、确定的或符合事实的,用于陈述句、疑问句和某些感叹句。 We are not ready. Did it rain all day yesterday? What a fine day today! B. 祈使语气 表使说话人的建议、请求、邀请、命令等。 Be careful. Don’t forget to clo se the window. Open the door, please. C. 虚拟语气 表使动作或状态不是客观存在的事实,而是说话人的主观愿望、假设或推测等。 2. 虚拟语气 一. 虚拟语气在条件句中的应用 学习虚拟语气在条件句中的用法之前我们必须清楚条件句的种类:条件句有真实条件句与非真实条件句(或称虚拟条件句)两种。真实条件句所表的假设是可能发生或实现的,句中的条件从句与结果主句都用陈述语气。如: If it doesn’t rain tomorrow, I will go for a picnic. 假若明天不下雨,我就去野餐。 Oil floats if you pour it on water. 你如把油倒在水里,油就浮起来。 虚拟条件句所表的假设则是不可能或不大可能发生或实现的,句中的条件从句与结果主句皆须用虚拟语气。 1. 与现在事实相反的虚拟条件句,条件从句的谓语用动词的过去式(be的过去式用were), 主句的谓语用should (would, might,could)+动词原形。 如: If it were not raining, we should go for a picnic.如果现在不下雨的话,我们就出去野餐了。 (事实是:天在下雨,我们不能出去野餐。表示愿望。) If he came here, he might be able to help you. 如果他来这,他就能够帮助你了。 (事实是:他没来这,他不可能帮助你。表示对他的良好印象。) 2. 与过去事实相反的虚拟条件句,条件从句的谓语用had+过去分词,主句的谓语用should (would, might,could)+ have +过去分词。 如:She would have gone to the party if she had been invited.

相关文档
相关文档 最新文档