在中,，單獨考察的題幾乎沒有,，但是語法知識點卻貫穿整張試卷，下面是小編為大家整理的英語四級知識,，希望可以為大家?guī)韼椭?，一起來學(xué)習(xí)一下吧。
　　11.15 過去完成時 1) 概念：表示過去的過去 其構(gòu)成是had 過去分詞構(gòu)成,。 那時以前 那時現(xiàn)在 2) 用法 a.在told, said, knew, heard, thought等動詞后的賓語從句,。 She said (that) she had never been to Paris. b. 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。
　　When the police arrived, the thieves had run away. c. 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. 3)過去完成時的時間狀語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, leftB,，were writing, has left C. had written, had leftD. 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表示的是時間的一點,，表示在"同學(xué)們正忙于……"這一背景下，when所引導(dǎo)的動作發(fā)生,。因此 前一句應(yīng)用過去進行時,。
　　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. 推薦信息：