語法講解 | 什么情況下使用過去完成時?
英語的過去完成時表示表示過去的過去。這個是大家在中學(xué)時期就知道的,今天,小編為同學(xué)們帶來了相當(dāng)豐富的與英語過去完成時的相關(guān)語法,一起來看看吧!
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概念: 表示過去的過去,其構(gòu)成是had +過去分詞?! ?/p>
一、過去完成時常用的連詞有: before, by, until, when, after, once, as soon as等。例如:
He said that he had learned some English before.
By the time he was twelve, Edison had began to make a living by himself.
Tom was disappointed that most of the guests had left when he arrived at the party.
二、在什么情況下使用過去完成時?
1. 在told, said, knew, heard, thought等動詞引導(dǎo)的賓語從句中,一般用過去完成時。例如:
She said (that) she had never been to Paris.
2. 狀語從句
在過去不同時間發(fā)生的兩個動作中,發(fā)生在先,用過去完成時;發(fā)生在后,用一般過去時。例如:
When the police arrived, the thieves had run away.
3. 表示意向的動詞,如hope, wish, expect, think, intend, mean, suppose等,用過去完成時表示“原本……,未能……”。例如:
We had hoped that you would come, but you didn't.
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典型例題:
The students ________ busily when Miss Brown went to get a book she ____ in the office.
A. had written, left
B. were writing, has left
C. had written, had left
D. were writing, had left
答案D。 “把書忘在辦公室”發(fā)生在“去取書”這一過去的動作之前,因此“忘了書”這一動作發(fā)生在過去的過去,用過去完成時。句中when代表時間的一點,表示在“同學(xué)們正忙于……”這一背景下, when所引導(dǎo)的動作正在發(fā)生。因此前一句應(yīng)用過去進行時。
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