標(biāo)志詞：

（1）表示在過去某一時(shí)刻或動(dòng)作以前完成了的動(dòng)作，也可以說過去的時(shí)間關(guān)于過去的動(dòng)作。即“過去的過去”?？梢杂胋y,before等介詞短語或一個(gè)時(shí)間狀語從句來表示，也可以用一個(gè)表示過去的動(dòng)作來表示，還可能通過上下文來表示。
（2）表示由過去的某一時(shí)刻開始，一直延續(xù)到過去另一時(shí)間的動(dòng)作或狀態(tài)，常和for,since構(gòu)成的時(shí)間狀語連用。
（3）敘述過去發(fā)生的事情，在已敘述了過去發(fā)生的事情后，反過來追述或補(bǔ)述以前發(fā)生的動(dòng)作時(shí)，常使用過去完成時(shí)。
（4）在含有定語從句的主從復(fù)合句中，如果敘述的是過去的事，先發(fā)生的動(dòng)作常用過去完成時(shí)。
（5）過去完成時(shí)常常用在told,said,knew,heard,thought等動(dòng)詞后的賓語從句（或間接引語）中，這時(shí)從句中的動(dòng)作發(fā)生在主句表示的過去的動(dòng)作之前。
（6）狀語從句：在過去不同時(shí)間發(fā)生的兩個(gè)動(dòng)作中，發(fā)生在前，用過去完成時(shí)；發(fā)生在后，用一般過去時(shí)。
注意：如果兩個(gè)動(dòng)作緊接著發(fā)生，則常常不用過去完成時(shí)，特別是在包含before和after的復(fù)合句中，因?yàn)檫@時(shí)從句的動(dòng)作和主句的動(dòng)作發(fā)生的先后順序已經(jīng)非常明確，這時(shí)可以用一般過去時(shí)代替過去完成時(shí)。
（7）動(dòng)詞think, want, hope, mean, plan, intend等用過去完成時(shí)來表示過去未曾實(shí)現(xiàn)的想法，希望，打算或意圖等。
（8）過去完成時(shí)還可用在hardly…when…, no sooner…than…, It was the first (second, etc) time (that)…等固定句型中。

過去完成時(shí)-語法判定
1. 由時(shí)間狀語來判定 一般說來，各種時(shí)態(tài)都有特定的時(shí)間狀語。與過去完成時(shí)連用的時(shí)間狀語有：
（ 1 ） by + 過去的時(shí)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(shí)間點(diǎn)。
如： We had learned over two thousand English words by the end of last term.
（ 3 ） before + 過去的時(shí)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(shí)表示“過去的過去”，是指過去某一動(dòng)作之前已經(jīng)發(fā)生或完成的動(dòng)作，即動(dòng)作有先后關(guān)系，動(dòng)作在前的用過去完成時(shí)，在后的用一般過去時(shí)。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(shí)，且從句的動(dòng)作先于主句的動(dòng)作時(shí)，從句要用過去完成時(shí)。
在told, said, knew, heard, thought等動(dòng)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(shí)間、條件、原因、方式等狀語從句中，主、從句的動(dòng)作發(fā)生有先后關(guān)系，動(dòng)作在前的，要用過去完成時(shí)，動(dòng)作在后的要用一般過去時(shí)。
如：After he had finished his homework, he went to bed.
注意：before, after 引導(dǎo)的時(shí)間狀語從句中，由于 before 和 after 本身已表達(dá)了動(dòng)作的先后關(guān)系，若主、從句表示的動(dòng)作緊密相連，則主、從句都用一般過去時(shí)。
如： After he closed the door, he left the classroom.
（3）表示意向的動(dòng)詞，如hope, wish, expect, think, intend, mean, suppose等，用過去完成時(shí)表示"原本…，未能…"
We had hoped that you would come, but you didn't.
3. 根據(jù)上、下文來判定。
I met Wang Tao in the street yesterday. We hadn't seen each other since he went to Beijing.

典型例題
(1) ---Do you know our town at all?
---No, this is the first time I ___ here.
A. was B. have been C. came D. am coming
答案B. This is the first time 后面所加從句應(yīng)為現(xiàn)在完成時(shí)，故選B。
(2) ---Have you ____ been to our town before?
---No, it's the first time I ___ here.
A. even, come B. even, have come C. ever, come D. ever, have come
答案D. ever意為曾經(jīng)或無論何時(shí)，反意詞為never，此兩詞常用于完成時(shí)。 This is the largest fish I have ever seen. It is / was the first time +that-clause 的句型中，從句要用完成時(shí)。
注意：非延續(xù)性動(dòng)詞的否定形式可以與表示延續(xù)時(shí)間的狀語連用。即動(dòng)作不發(fā)生的狀態(tài)是可以持續(xù)的。
（錯(cuò)）I have received his letter for a month.
（對(duì)）I haven't received his letter for almost a month.

過去完成時(shí)的時(shí)間狀語before, by, until , when, after, once, as soon as。
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.

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(dòng)作之前，因此"忘了書"這一動(dòng)作發(fā)生在過去的過去，用過去完成時(shí)。句中when表示的是時(shí)間的一點(diǎn)，表示在"同學(xué)們正忙于……"這一背景下，when所引導(dǎo)的動(dòng)作發(fā)生。因此前一句應(yīng)用過去進(jìn)行時(shí)。

注意： had no … when 還沒等…… 就……
had no sooner… than 剛…… 就……
He had no sooner bought the car than he sold it.
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