來源:網(wǎng)絡(luò)資源 2023-08-16 15:06:49
一、過去完成時的概念與結(jié)構(gòu)特點(diǎn)
1)概念:過去完成時表示在過去某一時間或動作之前已經(jīng)發(fā)生或完成了的動作,即“過去的過去(past-in-the-past)”。
----|-------------------------- |-------------------------------|-----------------------|------->
?______________ 過去 現(xiàn)在 將來
2)構(gòu)成:過去完成時由“助動詞had +過去分詞”構(gòu)成,其中had通用于各種人稱。
They had already had breakfast before they arrived at the hotel.
She had finished writing the composition by 10:00 this morning.
二、過去完成時的判斷依據(jù)
1)由時間狀語來判定
一般說來,各種時態(tài)都有特定的時間狀語。與過去完成時連用的時間狀語有:
(1)by +過去的時間點(diǎn)。如:
I had finished reading the novel by nine o'clock last night.
(2)by the end of +過去的時間點(diǎn)。如:
We had learned over two thousand English words by the end of last term.
(3)before +過去的時間點(diǎn)。如:
They had planted six hundred trees before last Wednesday.
2)由“過去的過去”來判定。
過去完成時表示“過去的過去”,是指過去某一動作之前已經(jīng)發(fā)生或完成的動作,即動作有先后關(guān)系,動作在前的用過去完成時,在后的用一般過去時。這種用法常出現(xiàn)在:
(1)賓語從句中
當(dāng)賓語從句的主句為一般過去時,且從句的動作先于主句的動作時,從句要用過去完成時。在told, said, knew, heard, thought等動詞后的賓語從句。如:
She said that she had seen the film before.
(2)狀語從句中
在時間、條件、原因、方式等狀語從句中,主、從句的動作發(fā)生有先后關(guān)系,動作在前的,要用過去完成時,動作在后的要用一般過去時。如:
When I got to the station, the train had already left.
After he had finished his homework, he went to bed.
注意:before, after引導(dǎo)的時間狀語從句中,由于before和after本身已表達(dá)了動作的先后關(guān)系,若主、從句表示的動作緊密相連,則主、從句都用一般過去時。如:
Where did you study before you came here?
After he closed the door, he left the classroom.
(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…" We had hoped that you would come, but you didn't.
三、過去完成時的主要用法
1)過去完成時表示一個動作或狀態(tài)在過去某一時間或動作之前已經(jīng)完成或結(jié)束,即發(fā)生在“過去的過去”。如:
When I woke up, it had stopped raining.
我醒來時,雨已經(jīng)停了。(主句的動作發(fā)生在“過去的過去”)
2)過去完成時是一個相對的時態(tài),表示的是“過去的過去”,只有和過去某一時間或某一動作相比較時才使用它。如:
He told me that he had written a new book. (had written發(fā)生在told之前)
3)過去完成時需要與一個表示過去的時間狀語連用,它不能離開過去時間而獨(dú)立存在。此時多與already,yet,still,just,before,never等時間副詞及by,before,until等引導(dǎo)的短語或從句連用。如:
Before she came to China, Grace had taught English in a middle school for about five years.
Peter had collected more than 300 Chinese stamps by the time he was ten.
4)過去完成時表示某一動作或狀態(tài)在過去某時之前已經(jīng)開始,一直延續(xù)到這一過去時間,而且動作尚未結(jié)束,仍然有繼續(xù)下去的可能。如:
By the end of last year, he had worked in the factory for twenty years.(had worked已有了20年,還有繼續(xù)進(jìn)行下去的可能)
四、過去完成時與現(xiàn)在完成時的區(qū)別
現(xiàn)在完成時表示的動作發(fā)生在過去,但側(cè)重對現(xiàn)在產(chǎn)生的結(jié)果或造成的影響,與現(xiàn)在有關(guān),其結(jié)構(gòu)為“助動詞have (has) +過去分詞”;過去完成時則是一個相對的時態(tài),它所表示的動作不僅發(fā)生在過去,更強(qiáng)調(diào)“過去的過去”,只有和過去某時或某動作相比較時,才用到它。
試比較:
I have learned 1000 English words so far.到目前為止我已經(jīng)學(xué)會了1000個英語單詞。
I had learned 1000 English words till then.到那時為止我已經(jīng)學(xué)會了1000個英語單詞。
— I'm sorry to keep you waiting.對不起,讓你久等了。
— Oh, not at all. I have been here only a few minutes.沒什么,我只等了幾分鐘。
(“等”的動作從過去某一時間點(diǎn)持續(xù)到現(xiàn)在)
— John returned home yesterday.約翰昨天回到家的。
— Where had he been?他去哪兒了?
(答語中使用過去完成時是指約翰在returned home之前去了哪些地方,即“過去的過去”
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