1. She wondered if the buses would still be running.
2. The truth is that the fog is too thick for the bus to run that far.
3. She sensed that she was being watched by a tall man in a dark coat.
4. When we will start is not clear.
5. I had no idea that you were her friend.
1.连接词有：that whether 和lf
2.连接代词有：who whom whose which what等
3.连接副词有：when where why how 等
另外whatever whoever whichever等也可以引导主语和宾语两种从句。
?（01春招）What the doctors really doubt is______my brother will recover from the serious disease soon.
?Some researchers believe that there is no doubt _______ a cure for AIDS will be found.
?That he’ll come is certain.__________________
?The fact is that I have never been here.__________________
?The fact that she hadn’t said anything surprised all of us.___________________
?I think(that)he’ll be all right in a few days.
?Li Yang ping explained to me(that)the force of gravity would change three times on our jouney and that the first change would be the most powerful
?The question is whether the film is worth seeing.
?Whether we shall attend the meeting hasn’t been decided yet.
?The news whether our team has won the match is unknown.
?It all depends on whether they’ll support us.