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er they had entered the house 是時(shí)間狀語從句,had entered 是過去完成時(shí)結(jié)構(gòu)。在以after引導(dǎo)的時(shí)間狀語從句中,用一般過去時(shí)或過去完成時(shí)沒有多少差別。如果強(qiáng)調(diào)從句的謂語動(dòng)作在主句的謂語動(dòng)作之前完成,就用過去完成時(shí)。 on, 打開,擰開(電視、水源、煤氣等)?! ∑浞戳x詞為 turn off(關(guān)上)?! ⌒赂拍钣⒄Z第一冊(cè)第119120課語法知識(shí)點(diǎn) Grammar in use 過去完成時(shí) 構(gòu)成: had +過去分詞?! ∵^去完成時(shí)主要用于表示兩個(gè)事件中一個(gè)發(fā)生在前,或者說是表示較早的過去。常與現(xiàn)在完成時(shí)連用的副詞,如 already(已經(jīng)), ever(曾經(jīng)),for +表示時(shí)間段的詞,just(剛剛)和never(從未)也常與過去完成時(shí)連用,以強(qiáng)調(diào)事件發(fā)生的先后次序。有時(shí)我們不一定非得用過去完成時(shí)表示先發(fā)生的事件,因?yàn)橐馑际智宄?,如: After I finished ,I went home. 我做完后就回家了?! ≌?qǐng)看例句: She went on holiday after she had taken the exam. 她考試后度假去了?! ran to the platform quickly, but the train had already left. 我趕快跑到站臺(tái)上,但是火車已經(jīng)開走了?! e had had dinner before they arrived. 他們到達(dá)之前我們就已吃飯了?! he patient had died when the doctor arrived. 大夫到達(dá)時(shí)病人已經(jīng)死了。 新概念英語第一冊(cè)第119120課重點(diǎn)單詞學(xué)習(xí) Word study v. (1)進(jìn)入。穿入: After they had entered the house, they went into the dining room. 他們進(jìn)入了房子后,就去了餐廳?! he bullet entered his heart. 子彈射入了他的心臟。 (2)參加。加入: Four students from our university entered the final co