小學(xué)英語語法總結(jié)：過去完成時(shí)

　1 、過去完成時(shí)是一個相對時(shí)態(tài)，表示過去的過去，只有在兩個過去發(fā)生的動作相比較時(shí)才可顯示出來。

　　e.g. As soon as we got to the station, the train had left.

　　注：主從句表達(dá)的動作緊接時(shí)，即兩動作發(fā)生的時(shí)間沒有明顯時(shí)間上的懸殊或空檔時(shí)，主從句都可用一般過去時(shí)。

　　e.g. Where did your brother study before he joined the army?

　　2 、過去完成時(shí)可表示截止過去某一時(shí)間動作的總或動作的結(jié)束。

　　e.g. By the end of last month. We had reviewed four books

　　By eight o`clock, he had finished his homework.

　　與這個時(shí)態(tài)連用的時(shí)間狀語常有：

　　by 1985, by eight o`clock, by then, by the end of last month, by the time when, when, as soon as, before 等連詞引導(dǎo)的時(shí)間狀語從句，表示主句動作結(jié)束的時(shí)間。