句型：

It is time for sb. to do sth　 "到……時間了"　 "該……了"

It is time sb. did sth. "時間已遲了"　 "早該……了"

It is time for you to go to bed.　 你該睡覺了。

It is time you went to bed.　　　你早該睡覺了。

would (had) rather sb. did sth.　表示'寧愿某人做某事'

I'd rather you came tomorrow.

wish, wonder, think, hope 等用過去時，作試探性的詢問、請求、建議等。

I thought you might have some. 我以為你想要一些。

比較：

一般過去時表示的動作或狀態都已成為過去，現已不復存在。

Christine was an invalid all her life.

(含義：她已不在人間。)

Christine has been an invalid all her life.

(含義：她現在還活著)

Mrs. Darby lived in Kentucky for seven years.

(含義：達比太太已不再住在肯塔基州。)

Mrs. Darby has lived in Kentucky for seven years.

( 含義：現在還住在肯塔基州，有可能指剛離去)

注意： 用過去時表示現在，表示委婉語氣。

動詞want, hope, wonder, think, intend 等。

Did you want anything else?

I wondered if you could help me.

2)情態動詞 could, would.

Could you lend me your bike?

used to / be used to

used to + do："過去常常"表示過去習慣性的動作或狀態，但如今已不存在。

Mother used not to be so forgetful.

Scarf used to take a walk.　 (過去常常散步)

be used to + doing： 對……已感到習慣，或"習慣于"，to是介詞，后需加名詞或動名詞。

He is used to a vegetarian diet.

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