could

1. MODAL You use could to indicate that someone had the ability to do something. You use could not or couldn't to say that someone was unable to do something. 能; 會(huì)

I could see that something was terribly wrong. 我能看出有很大麻煩了。

When I left school at 16, I couldn't read or write. 我16歲離開(kāi)學(xué)校時(shí)不會(huì)讀也不會(huì)寫(xiě)。

2. MODAL You use could to indicate that something sometimes happened. 可能會(huì)

Though he had a temper and could be nasty, it never lasted. 盡管他有脾氣，可能會(huì)粗暴，但從來(lái)不會(huì)持續(xù)很久。

3. MODAL You use could have to indicate that something was a possibility in the past, although it did not actually happen. 本可能

He could have made a fortune as a lawyer. 他本可能當(dāng)律師掙大錢(qián)。

You could have been killed!

你本可能被殺了。

4. MODAL You use could to indicate that something is possibly true, or that it may possibly happen. 可能

Doctors told him the disease could have been caused by years of working in smoky clubs. 醫(yī)生們告訴他，他的病可能是多年在煙霧彌漫的俱樂(lè)部工作所引起的。

An improvement in living standards could be years away. 生活水平的提高可能還要幾年。

5. MODAL You use could not or couldn't to indicate that it is not possible that something is true. 可能 (與否定詞)(not)(連用，表示不可能)

They argued all the time and thought it couldn't be good for the baby. 他們一直在爭(zhēng)論，認(rèn)為這不可能對(duì)孩子有好處。

Anne couldn't be expected to understand the situation. 別指望安妮會(huì)理解這種形勢(shì)。

6. MODAL You use could to talk about a possibility, ability, or opportunity that depends on other conditions. 能; 可能

Their hope was that a new and better East Germany could be born. 他們的希望是一個(gè)全新更好的東德能誕生。

7. MODAL You use could when you are saying that one thing or situation resembles another. 像

The charming characters she draws look like they could have walked out of the 1920s. 她畫(huà)的那些可愛(ài)人物看上去像是從20世紀(jì)20年代走出來(lái)的。

8. MODAL You use could, or couldn't in questions, when you are making offers and suggestions. 可以 (用于建議)

I could call the local doctor. 我可以給當(dāng)?shù)蒯t(yī)生打電話。

You could look for a career abroad where environmental jobs are better paid and more secure. 你可以在國(guó)外找份工作，那里環(huán)保工作薪水更高，也更穩(wěn)定。

Couldn't we call a special meeting?

我們不能召開(kāi)一次特別會(huì)議嗎？

9. MODAL You use could in questions when you are making a polite request or asking for permission to do something. Speakers sometimes use couldn't instead of "could" to show that they realize that their request may be refused. 可以[禮貌]

Could I stay tonight?

今晚我可以待在這嗎？

He asked if he could have a cup of coffee. 他問(wèn)是否可以喝一杯咖啡。

Couldn't I watch you do it?

我不可以看著你做這件事嗎？

10. MODAL You use could to say emphatically that someone ought to do the thing mentioned, especially when you are annoyed because they have not done it. You use why couldn't in questions to express your surprise or annoyance that someone has not done something. 本可以 (對(duì)某人未做某事表示惱怒)[強(qiáng)調(diào)]

We've come to see you, so you could at least stand and greet us properly. 我們來(lái)是為了看你，因此你至少可以站起來(lái)適當(dāng)?shù)貧g迎我們。

Why couldn't she have said something?

為什么她不能說(shuō)點(diǎn)什么呢？

11. MODAL You use could when you are expressing strong feelings about something by saying that you feel as if you want to do the thing mentioned, although you do not do it. 表示嘴上說(shuō)要做實(shí)際上沒(méi)有做[強(qiáng)調(diào)]

I could kill you! I swear I could!

我要?dú)⒘四?！我發(fā)誓我要。

"Welcome back" was all they said. I could have kissed them!

“歡迎回來(lái)，”他們只說(shuō)了這一句。我本想親吻他們的。

12. MODAL You use could after "if" when talking about something that you do not have the ability or opportunity to do, but which you are imagining in order to consider what the likely consequences might be. 能 (與)(if)(連用，表示假設(shè))

If I could afford it, I'd have four television sets. 要是我買(mǎi)得起，我要有4臺(tái)電視機(jī)。

13. MODAL You use could not or couldn't with comparatives to emphasize that someone or something has as much as is possible of a particular quality. For example, if you say "I couldn't be happier," you mean that you are extremely happy. 不可能再 (表示已達(dá)到極致)[強(qiáng)調(diào)]

The rest of the players are great and I couldn't be happier. 其他運(yùn)動(dòng)員都很優(yōu)秀，我再高興不過(guò)了。

14. MODAL In speech, you use how could in questions to emphasize that you feel strongly about something bad that has happened. 怎么能; 怎么會(huì)[強(qiáng)調(diào)]

How could you allow him to do something like that?

你怎么能允許他做那樣的事情？

How could I have been so stupid?

我怎么會(huì)這么傻？

15. could do with→see do