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when,since,before,that句型

when,since,before,that句型
when,since,before,that句型

It+be+……+that/since/before/when用法辨析

1.it was+ (时刻,或时间点)+ when sth. happened.当某事发生时,是几点钟或哪一年如:

It was 1997 when Hongkong returned to China.

It was five o'clock when we arrived at the small mountain village.

对比强调句型:It was at five o'clock that we arrived at the small mountain village.

It+ is/ was+…+that…多用于强调。

判断方法如下:去掉it、be和that,余下的部分仍是一个完整的句子,这样的句子一定是强调句。

2.it was+一段时间+ before sth happened. 过了一段时间之后,某事才发生了。如:

it was two years before Macao returned to China.

it will be +一段时间before sth. happens.要过一段时间之后,某事才会发生。

或不用过多久,某些就将发生:it won't be long before sth. happens.

It won’t be long before you see him again.

没过多久就…

It was long before they escaped from the prison.

过了很久才….

3.it is (=has been)+一段时间since sth. happened.自某事发生以来,(时间)已经过去。。。了。

如:It is 11 years since Hongkong returned to China.香港回归已经有11年了。

若从句中的动词是终止性动词,意为:“从开始……多久了”例如:

It has been five years since she left home.(她离家已经十五年了)It was four years since he had died.(到当时为止,他已死去四年了)若从句中的动词是延续性动词,意为:“不做某事已有多久了”例如:

It is two days since she was ill.(她病好了两天)

It is two years since he studied English.(他已有两年没学英语了)练习:请用before,since,that,when填空。

1.It was last Sunday _____ I came across Mr Brown.

2.It was midnight _____ the young couple came back from the ball.

3.It won’t b e a minute _____the lunch is ready.

4.It is two weeks _____the Smiths lived in our village.

5.It was not until 1920 _____ regular radio broadcasts began.

6.Was it during the Second World War _____ he died?

7.It has been one year _____ I got the job.

8.It w asn’t long _____ they drove the enemy off their country.

9.It will be two years _____ we meet again.

10.It is years _____ I enjoyed myself so much.

五大基本句型的讲解与练习(无答案)

五大基本句型 一、及物动词和不及物动词 1.及物动词(vt.):不能单独使用。必须接宾语。 2.不及物动词(vi.):可以单独使用。但如果要接宾语或补语,必须要介词连接。 注意:1.很多词既可以是及物动词也可以是不及物动词。 2.一般情况下,来往型动词(go ,come, arrive, move等)、存在型动词(be、exist)、 发生型动词(happen等)都是不及物动词 3.特别注意marry(和……结婚),reach(到达……),enter(进入……),attend(参 加……),discuss(讨论……)这些词都是及物动词 二、句子主要成分 1.主语:句子主要陈述对象,也是动作的发出者。由名词(代词)担任。 2.谓语:主语发出的动作。只能由动词担任。 3.宾语:动作的承受着。由名词(代词)担任。 4.补语:起补充说明的作用。可以由名(代)形担任 注意:1.主谓必须放在句子最前面。谓语必须紧跟在主语后面。 2.谓语动词的类型,决定了句子的类型。 三、五大类型 类型一 主+谓(S+V) 例:I go._________________________________________________________________ We study.____________________________________________________________ My mom cooks.________________________________________________________ 这些句子中的动词都是_______动词。 这些句子的形式都过于简单,因此我们会在后面添加上_____词,让它们更完整。 但是________词并不是句子的基本要素,是可有可无的。 类型二 主+谓+宾(S+V+O) 例:I read this_______.(书) You want ________.(快乐) I love ________. (你) 这种句型使用的频率最_____。 这里的动词全是_______动词,即动词的后面必须要跟上_____语。且宾语要由______ 词来担任 类型三 主+系+表(S+L+P) 例:I am._________________________________________________________________ She looks._____________________________________________________________

before/ago,since用法

before和ago都能表示在一段时间以前,但是二者的内涵和具体用法有明显的区别: 1. before表示从过去或将来某一时间算起多少时间以前,由于与这一时间状语连用的行为先发生在过去或将来某一时刻之前,因此往往出现在过去完成时态或将来完成时态中。例如: ①I called him up last night,but his mother told me he had left for Wuhan two days before. ②She said that she had married him five years before. 2.如果不具体表明多少时间以前,before意为"从前;以前",表示从现在开始追溯到过去一段时间,或者主句的谓语动词表示的是经常、反复发生的行为,以副词的形式置于句末,可以用在现在完成时态中。例如: ①I have never been to Beijing before. ②Have you ever seen a tiger before? ③I often go over the lessons that I have learned a few days before. 注意:before前的时间状语如果是特定的,含义不一样。试比较: He said he had arrived here a day before. (一天前) He said he had arrived here the day before. (前一天) 3. ago指的是从现在起到过去时间的某一点的一段时间。这个时间状语常与一般过去时态或过去进行时态连用。例如: ①I graduated from the college twenty years ago. ②I was asked what I was doing a month ago. 4. 表示在某一时间点或事件以前时,只能用before,不用ago。因为这种用法是将before当作介词或连词使用。ago不具有这种功能。例如: ①He will come back before eleven o'clock.

英语句型转换讲课教案

英语句型转换

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十大词性、句子成分分析、五大基本句型及句子类型讲解与练习 一、新课导入 个体名词 厂 「 集体名词」可数名词 普通名词 物质名词 1. 名词 抽象名词」*,不可数名词 专有名词 功能:表示人或事物的名称 人称代词: 主格 宾格(注意it 的用法) 物主代词:形容词性物主代词 名词性物主代词 指示代词:this, that, these, those 单数: myself, yourself, himself, herself, itself, on eself 反身代词: 复数:ourselves, yourselves, themselves 2?代词 疑问代词: who, whom, whose, what, which. 简单不定代词: One/on es, Either/ neither, both/all, each/ every ano ther, other, the other, others, the others 复合不定代词: somebody, an ybody, n obody 不定代词、 some one, anyone, no one somethi ng, any thi ng, nothing everybody, every one, everyth ing 功能:用来代替名词、形容词或数词等 基数词 序数词 功能:表数量或顺序 定冠词 不定冠词 零冠词 //功能:用在名词前,帮助说明名词所指的人或事物 表地点: at/ in/ on/ to, above/ over/ on, below/ under/ undern eath 表时间: in/ on/ at, in/ after, from/since from, after/ beh ind, 表运动: across/ through/ over/ pass … 表方位:…. 其他 3. 数词: 4. 冠词: 5.介词:

it was+ 一段时间+since还是before从句

1. It is +一段时间+ since从句 在“It is +时间段+ since从句” 句型中,如果since从句的谓语动词是瞬间性动词,表示肯定意义;如果since从句的谓语动词是延续性动词,则表示否定意义。例如: 1) It is / has been ten years since he left Beijing. 译文:自从他离开北京已经十年了。分析:since从句中的left是leave的过去式,是瞬间性动词,表示肯定的意思,left译为“离开” 2) It is / has been ten years since he was a doctor. 他不当医生已经十年了。 分析:since从句中的系表结构表示一种状态,这种状态是延续性的,表示否定意义,译为“不是,不当” 注:时间的计算一律从since从句的动作完成或状态结束时算起。 2. It was / will be +一段时间+

before从句 1) 在“It was + 一段时间+ before从句” 句型中,若主句是一般过去式,从句也是一般过去式时: ①若主句是肯定句,翻译成“过了多长时间之后才……”例: It was long before they found their son. 过了很久他们才找到他们的儿子。 ②若主句是否定形式,翻译成“没过多久就……” 例:It was not long before the couple met again. 没过多久这对夫妻就见面了。 2) 在“It will be + 一段时间+ before 从句”句型中,若主句是一般将来时,从句也是一般现在时: ①若主句是肯定句,翻译成“要过多长时间之后才……” 例:It will be half a year before I come back. 半年后,我才回来。 ②若主句是否定形式,翻译成“用不了多久就……” 例:It won’t be long before we meet

When引导的定语从句与时间状语从句的区分

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提分必备冀教版小学英语句型转换方法详解

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after,before,since用法区别

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动词三单形式和句型转换讲解教案资料

动词三单形式和句型 转换讲解

小学英语动词的三单形式讲解 大家都知道,在一般现在时中,当主语是第三人称单数时,谓语动词要用第三人称单数形式,即常在动词原形后加-s或-es。但有些同学们对于哪些主语是第三人称单数还不十分清楚,现归纳总结如下:一、人称代词he, she, it是第三人称单数。如: He likes watching TV. 他喜欢看电视。 She has lunch at twelve. 她十二点吃午餐。 It looks like a cat. 它看起来像只猫。 二、单个人名、地名或称呼作主语;是第三人称单数。如: ① Han Mei looks like her mother. 韩梅看起来像她的母亲。 ② Beijing is in China. 北京在中国。 ③ Uncle Wang often makes cakes. 王叔叔经常做蛋糕。 三、单数可数名词或"this / that / the+单数可数名词"作主语时,是第三人称单数。如: ① A horse is a useful animal. 马是有用的动物。 ② This book is yours. 这本书是你的。 ③ That car is red. 那辆小汽车是红色的。 ④ The cat is Lucy's. 这只猫是露茜的。 四、不定代词someone, somebody, nobody, everything, something等及指示代词this, that作主语时,是第三人称单数。如: ① Everyone is here. 大家到齐了。 ② There is something wrong with the watch. 这块手表有毛病。 ③ This is a pen. 这是一支钢笔。 ④ That is a rubber. 那是一块橡皮擦。 五、不可数名词作主语时为第三人称单数。如: ① The milk is in the glass. 牛奶在玻璃杯里。 ② The bread is very small. 那面包很小。 六、当数字或字母作主语时,看作第三人称单数。如: ①"6" is a lucky number. "6"是个吉利数字。 ②"I" is a letter. "I"是个字母。 第三人称单数形式的构成 1. 一般直接在词尾加 s,如:work-works live-lives make-makes 2. 以s,x,ch ,sh等结尾的单词加 es , 如: miss-misses fix-fixes finish-finishes teach-teaches 3.以辅音字母加y结尾的单词,变y为i加 es , 如: fly-flies

since从句和 before从句

It is +时间段+ since从句和It was / will be + 一段时间 + before从句 1.表示过去的情况 在“It is +时间段+ since从句(从句用一般过去时)”句型中, 如果since从句的谓语动词是瞬间性动词,表示肯定意义;如果since从句的谓语动词是延续性动词,则表示否定意义。 1) It is / has been ten years since he left Beijing. 自从他离开北京已经十年了。 分析:since从句中的left是leave的过去式,是瞬间性动词,表示肯定的意思,left译为“离开” 2) It is / has been ten years since he was a doctor. 他不当医生已经十年了。 分析:since从句中的系表结构表示一种状态,这种状态是延续性的,表示否定意义,译为“不是,不当” 注:时间的计算一律从since从句的动作完成或状态结束时算起。 2.表示过去的情况 “It was+ 一段时间 + since从句(从句用过去完成时had done)”,主句用一般过去时,从句用过去完成时; “It had been + 一段时间 + since从句(从句用一般过去时)”即主句用过去完成时,从句用一般过去时。 It was three years since Jack had been a teacher. 杰克不当老师已经三年了。 3. It was / will be + 一段时间 + before从句 1) 在“It was + 一段时间 + before从句”句型中,若主句是一般过去式,从句也是一般过去式时: ①若主句是肯定句,翻译成“过了多长时间之后才……” It was long before they found their son. 过了很久他们才找到他们的儿子。②若主句是否定形式,翻译成“没过多久就……” It was not long before the couple met again. 没过多久这对夫妻就见面了。 2) 在“It will be + 一段时间 + before从句”句型中,若主句是一般将来时,从句也是一般现在时: ①若主句是肯定句,翻译成“要过多长时间之后才……” 例: It will be half a year before I come back. 半年后,我才回来。②若主句是否定形式,翻译成“用不了多久就……” It won’t be long before we meet again. 我们不久就会见面。

小学四年级句型转换练习题知识讲解

1.These are Mrs Wang?s shadows. (根据划线提问) __________ __________ are __________? 2.The tall trees are on the hill (改为一般疑问句) __________the tall ___________ on the ___________? 3. Is that a long bench?(改为复数句) __________ __________ long __________? 4. The paths are very long. (改为否定句) The __________ __________ very __________. 5. Is it a bench? Is it a chair?(改为选择疑问句) ___________ ___________ a bench __________ a chair? 6. What colour are the lawns?(根据实际情况回答) ___________ ___________. 1. Kitty likes playing football.(改为一般疑问句,并做否定回答)_______________________________________________ 2. My teacher likes talking with us.(改为否定句) _______________________________________________ 3. Dancing is my hobby. (根据划线部分提问) _______________________________________________ 4. new, school, is, club, in, there, a, our (连词成句) ________________________________________________ 5. I never go to school in July. (用Danny替换I,其他部分做相应改变)

before句型辨析与解析

before句型辨析与解析 It + will be + 时间段+ before等表示“在……之后……才”的句型总结 一、用于句型“It + will be + 时间段+ before...”句型中,表示“要过多久才…”,也可用于“It + may be + 时间段+ before...”,表示“也许要过多久才……”。Before 后的句子中用一般现在时态。 其否定形式“It will/would not be +时间段+ before…”表示“不久就……,过不了多久就……”。 (1)The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again. A. after B. before C. since D. when (2)—How long do you think it will be ______China sends a manned spaceship to the moon? —Perhaps two or three years. A. when B. until C. that D. before (3)It ________ long before we _______ the result of the experiment. A. will not be...will know B. is...will know C. will not be...know D. is...know (4) Scientists say it may be five or six years_________ it is possible to test this medicine on human patients. A. since B. after C. before D. when 解析:答案为BDCC。考题 (1)(2)before 用于肯定的“It + will be + 时间段+ before...”句型中,表示“要过多久…才…”。 (3)before在本题中用于否定句,意为“过不了多久就会……”, 状语从句要用一般现在时代替一般将来时,可知C项为正确答案,句意是:要不了多久我们就会知道试验的结果了。 (4)宾语从句中含有句型“It + may be + 时间段+ before...”,表示“也许要过多久才……”,故选择答案C。 二、用于句型“it was +时间段+ before …” 表示“过了(多长时间)才……”。其否定形式“ it was not +时间段+ before …” 意为“不久就……”, “没过(多长时间)就……”。 It was some time ___________we realized the truth. A. when B. until C. since D. before 解析:答案为D。before用于句型“it was +时间段+ before …” 表示“过了(多长时间)才……”。该题题意是“过了一段时间我们才意识到事情的真相”。故正确答案为C项。 表示“在……之后……才”。副词“才”在汉语中强调某事发生得晚或慢。如果在含有before从句的复合句中,强调从句动作发生得晚或慢时,就可以应用这种译法。 The American Civil War lasted four years _______ the North won in the end. A. after B. before C. when D. then 解析:答案为B。本题考查连词before表示“在……之后才……”之的用法,根据本句含义“美国南北战争持续了四年,北方才最终取得胜利”,可知本题应选B。 三、表示“……还没来得及……就……”。目的在于强调从句动作发生之前,主句动作已发生。 —Why didn't you tell him about the meeting? — He rushed out of the room _________ I could say a word. A. before B. until C. when D. after 解析:答案为A。本题考查连词before表示“……还没来得及……就……”的用法。句意是“我还没来得及说一句话,他就冲出了房间”。 四、表示“在……之前就……”。这时主句与before从句中的两个动作按时间先后依次发生。 It was evening______ we reached the little town of Winchester. A. that B. until C. since D. before 解析:答案为D。本题考查连词before表示“在……之前就……”的用法。句意是“我们到达小镇Winchester 之前就已经是傍晚时分了”。 五、表示“趁……”,“等到……”,或“没等……就…… ”等。

When引导的定语从句与时间状语从句的区分

一、从句是如何出题的 1. 时态 2. 考连接词 3. 考语言顺序 二、学好从句的两个基本条件 1. 时态 2. 从句的三个必须:①必须是句子;②必须有连接词;③必须是陈述句 三、状语从句、宾语从句、定语从句重点 1.如何判断何种从句 2. 从句的时态 3. 从句的连接词与扩展 4. 经典单选、从句与选词、长句子分析 四、如何判断三种从句 1. 状语从句无先行词 2. 宾语(表语)从句无先行词有动词或词组 3. 定语从句先行词多为名词或代词 一、When引导的定语从句与时间状语从句的区分 1. when的译法不同。在时间状语中,when 翻译成“当……的时候”I want to be a teacher when I grow up. 当我长大的时候,我要做一名老师。在定语从句中,when不翻译。I won't forget the day when he says he loves me. 我不会忘记他说爱我的那一天。 2. 在时间状语中,when从句前面或后面是句子;定语从句中,when从句不能位于句首,且通常when前为表示时间的名词day、year等。 3. when在从句的作用不同。在时间状语从句中,when是连词,只起连接主句和从句的作用,不做从句的任何成分。不过when引导的时间状语从句修饰主句的谓语,做主句的时间状语。 在定语从句中,when是关系副词,在从句中代替先行词做从句的时间状语,修饰从句的谓语。 例1 I will always remember the days when I lived with my grandparents in the country. 例2 I always remember the days in the country when I see the photo of my grandparents. 点评:例1意为“我会永远记得跟我祖父母一起住在乡下的那些日子”,其中when 引导的是一个定语从句, 修饰the days, when在从句中作时间状语。例2意为“当我看到祖父母的照片时,总是会想起在

(完整版)小学英语句型转换和时态讲解与练习

否定句:be动词(am、is、are)+not、 情态动词can+ not、 助动词(do、does) + 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,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, (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。 1.I am Tom. _____________________________ _ 2.He is nine. ____________________________ __ 3.They are pupils.______________________________ 4.I can fly a kite. ______________________________ 5.He can make a toy. ______________________________ 6.You must go home now.______________________________ 7.I like Jinan. 8.He likes swimming. 9.He has many books. 10.He has some books. 11.There is a pen on the desk. 12.There are some water in the glass. ______________________________ 13.You have got some books. ___________________________________ 14.You have some books. 15.He has got some apples. 16.He has some apples. _________________________________________ 17.I like to watch TV. ______ . 18.Xiao Fang and I go to the library everSaturday. . 19.Tim swims very well. ___________ . 20.Mr. Smith has many books about the cars. . 21.I want to play with my friends. . 22.We feel cold today. _____________ . 23.Bob reads English everyday. . 24.We do our homework at school. . 25.Mr. White has two houses. .

1五种基本句型讲解与练习

英语五中基本句型 句子的基本句型 由主语、谓语动词、表语、宾语、宾语补足语等句子成分,按不同方式可组合成五种基本句型。 句子成分的表示方法: S: Subject主语; V: Verb动词; O: Object宾语; P: Predicative表语; IO: Indirect Object间接宾语; DO:Direct Object 直接宾语 。

OC: Object Complement宾语补足语; ◇第一种句型:主语+不及物动词(S+V) 该句型所用动词都是不及物动词,其后当然不能接宾语,但是可以用状语修饰谓语动词或整个句子。 He runs fast in the street. 他在街上跑得飞快。 The meeting begins at nine. 会议九点开始。 ◇第二种句型:主语+及物动词+宾语(S+V+DO) 该句型所用动词都是及物动词,可作宾语的有名词、代词、不定式、动名词或短语及从句。We attended the meeting. 我们出席了那次会议。(名词作宾语) She stopped him. 她叫住了他。(代词作宾语) She wants to ask a question. 她要问一个问题。(不定式作宾语) They enjoy listening to the classic music. 他们喜欢听古典音乐。(动名词作宾语) 注意:一些不及物动词之后加上介词就可以具有及物动词的功能,其后就可以接宾语了。这一类词组有:listen to 听;look at 看;look after 照看;look for 寻找;arrive at/in 到达等。 May I turn on the light? 我可以开灯吗? What are you looking for? 你在找什么? ◇第三种句型:主语+连系动词+表语(S+V+P) 连系动词的后面必须接表语,说明主语的情况和状态。通常可作表语的是名词或形容词。She became a lawyer last year. 去年,她成为了一名律师。 He is honest. 他是诚实的。 It is getting colder and colder. 天气渐渐冷了。 It tastes delicious. 这好吃极了。 下列动词也作连系动词使用:look 看起来;smell 闻起来;sound 听起来;taste 尝起来;feel 感觉;keep 保持;grow/go/get/turn变得。 ◇第四种句型:主语+及物动词+间接宾语+直接宾语(S+V+IO+DO) (1)宾语分直接宾语和间接宾语。直接宾语是及物动词的直接对象,但某些动词,除直接宾

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