Would在各种情况下得使用

当我们想象一种情况或行为时，我们用would (' d) / wouldn’t(=我们想到某件事。

不是真实得):

It would be nice to buy a new car, but we can’t afford it.

I’d love to live by the sea.

a: Shall I tell Chris what happened?

b: No, I wouldn’t say anything.

(= I wouldn’t say anything in your situation)

We use would have (done) when we imagine something

that didn’t happen in the past:

当我们想象某事在过去没有发生过时，我们用would have (done):

They helped us a lot. I don’t know what we’d have done without their help.

(we’d have done = we would have done)

It’s a shame you didn’t see the film. You would have liked it.

I didn’t tell Sam what happened. He wouldn’t have been pleased.

比较 would (do) and would have (done):

I would call Lisa, but I don’t have her number. (now)

I would have called Lisa, but I didn’t have her number. (past)

I’m not going to invite them to the party. They wouldn’t come anyway.

I didn’t invite them to the party. They wouldn’t have come anyway.

我们经常在有if得句子中使用would：

I would call Lisa if I had her number.

I would have called Lisa if I’d had her number.

比较 will (’ll) 和would (’d):

I’ll stay a little longer. I’ve got plenty of time.

I’d stay a little longer, but I really have to go now. (so I can’t stay longer)

I’ll call Lisa. I have her number.

I’d call Lisa, but I don’t have her number. (so I can’t call her)

有时候 would/wouldn’t 是 will/won’t得过去式：

比较：

一般过去时：

TOM: I’ll call you on Sunday. → Tom said he’d call me on Sunday.

AMY: I promise I won’t be late. → Amy promised that she wouldn’t be late.

LISA: Oh, no! The car won’t start. → Lisa was annoyed because her car wouldn’t start.

Somebody wouldn’t do something = he/she refused to do it:

I tried to warn him, but he wouldn’t listen to me. (= he refused to listen)

The car wouldn’t start. (= it ‘refused’ to start)

你也可以用would来谈论过去经常发生得事情:

When we were children, we lived by the sea. In summer, if the weather was fine, we would

all get up early and go for a swim. (= we did this regularly)

Whenever Richard was angry, he would walk out of the room.

在这个意思下，would与used to相似

Whenever Richard was angry, he used to walk out of the room.