使用現(xiàn)在完成時(shí)和過去完成時(shí)的常用句型

(1)since句型：主句用完成時(shí)

My aunt has worked in a clinic since 1949.

從1949年開始，我嬸嬸就一直在一家診所工作。

(2)since when＋完成時(shí)

Since when have you planted so many young trees?

從什么時(shí)候開始你種植了這么多小樹的？

(3)This/it is the first (third...) time sb.have done sth.

This is the first time I have been here.

這是我第一次到這兒。

(4)by...(到……為止)到過去某個(gè)時(shí)候?yàn)橹褂眠^去完成時(shí)，到現(xiàn)在為止用現(xiàn)在完成時(shí)，到將來某個(gè)時(shí)候?yàn)橹褂脤硗瓿蓵r(shí)

She will have finished the book by my next birthday.

到我下一個(gè)生日為止，她將完成那本書。

比較

By the time the speaker entered the hall，all the listeners were seated.

就在主講者進(jìn)入大廳的時(shí)候，所有的聽眾都坐好了。

(5)in the past time( two days/years...) ＋完成時(shí)

In the past 10 years，there have been great changes in our family life.

在過去的十年里，我們的家庭生活發(fā)生了很大的變化。

(6) hardly...when... (no sooner...than)前面句型用過去完成時(shí)

Hardly had I reached the school when the bell rang.

我一到學(xué)校，鈴就響了。

(7) 未實(shí)現(xiàn)的愿望、打算等用過去完成時(shí)

I had thought I could pass the final examination but I failed.

我估計(jì)我可以通過期末考試，但結(jié)果我沒通過。

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