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ket語(yǔ)法考試:could you please open the door

來(lái)源:小編 編輯:小編 日期:2023-03-01 22:10:45

1. 過(guò)去進(jìn)行時(shí)

用來(lái)談?wù)撨^(guò)去某一時(shí)間正在發(fā)生的事情。

I was playing football at 3:30 yesterday.

用來(lái)討論過(guò)去某一時(shí)間同時(shí)發(fā)生的兩件事

He was doing homework while his sister was watching TV.

過(guò)去的情況和過(guò)去的情況發(fā)生在同一句話中:

Iwas doing homework when mysister cameto talk to me.

Someone knocked at the doorwhilemy mother was cooking.

否定句,疑問(wèn)句的表達(dá)方式:

He was not/wasn't working.

They were not/weren't speaking to each other.

Was he working?Yes, he was/No, he wasn't.

Were they speaking to each other? Yes, they were/No, they weren't.

2. can/can't/could/couldn't

有時(shí),could可用作can的過(guò)去式。

can/can't表達(dá)能力,用于當(dāng)今時(shí)代。

I canhelp you.(我可以幫助你)

could/couldn“t表示能力,在過(guò)去使用。比較:

can/can't表示概率,用于當(dāng)今時(shí)代。

This can't be true.(這個(gè)不可能是真的)

could表示概率,用于過(guò)去,或者用于現(xiàn)在,但是語(yǔ)氣不如can強(qiáng)烈。

He couldn't go therewithout me.(他不可能不帶我一起去)

can/could也可用于當(dāng)今時(shí)代的請(qǐng)求,不同之處在于could比can語(yǔ)氣更加委婉客套。

Can you help me please?

Could you please open the door?

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