Question：老師,，有時(shí)在主句中會(huì)出現(xiàn)could等詞嗎,？

Answer：是的,，我們今天繼續(xù)學(xué)習(xí)條件句和虛擬語(yǔ)氣（4） If 條件句（4）

條件句和虛擬語(yǔ)氣（4） If 條件句（4）

If +過(guò)去完成式 + would have 等（2）

I．If +過(guò)去完成式 + could have或might have

Reading：

If the weather had bee better, there wouldn’t have been a problem. They could have landed in London quite easily, and it wouldn’t have been necessary to fly to Scotland. If  David had needed to get home that night, he could have gone back to London by train. But he decided to stay in a hotel. At the reception desk a woman dropped her pen. He picked it up for her. If he hadn’t been standing there, he wouldn’t have seen her. If she hadn’t dropped her pen, he might not have noticed her. If he hadn’t been there, someone else might have picked it up.

1．在主句亦可以用  could have和 might have,。

If the weather had been better, they could have landed in London.

(=They would have been able to land. It would have been possible to land.)

If he hadn’t been there, someone else might have picked it up.

(=Perhaps someone else would have picked the pen up.)

2．有時(shí),，在if從句中用過(guò)去完成進(jìn)行式

If he hadn’t been standing there, he wouldn’t have seen her.

小練習(xí)I：

1 If he 'd needed to get home that night, what could he have done.?

2 What might have happened if the woman hadn’t dropped her pen ?

II．If +過(guò)去完成 + would或would be +-ing

Reading:

David and Hannah, the woman he met in the hotel, are now married and living in Scotland. They often talk about their first meeting.

“If I hadn’t dropped my pen, I wouldn’t know you now and I wouldn’t be wearing this ring.”

“Yes, it’s funny. If I hadn’t met you, I’d still be living in London. And if someone else had picked your pen up, I wouldn’t be here with you now.

1．有時(shí)談到過(guò)去和現(xiàn)在的聯(lián)系，用would或 would be +-ing

If +過(guò)去完成（過(guò)去的行為）        + would（現(xiàn)在的情況）

If I hadn’t dropped my pen, I wouldn’t know you now.

If +過(guò)去完成（過(guò)去的行為）        + would be + -ing（現(xiàn)在的情況）

If Ihadn’t met you I’d still be living in London now.

上期答案：

I 1 Yes, it was.   2 No, they didn’t.  3 Yes, it did.

II 1 I’d have been worried.  2 I wouldn’t have taken  3 would he have got home on time ?

小練習(xí)II：用 if造句：

1 He met her. He isn’t living in London now.

2 She dropped her pen. He knows her now.

3 He picked her pen up. He’s here with her now.