中考英語一�？记皼_刺輔導(dǎo)：時(shí)間狀語從句

　　連詞主要有：when as while before after until as soon as since等

　　(1)區(qū)別when, as, while的用法

　�、�.when"當(dāng)......時(shí)候"引導(dǎo)的時(shí)間狀語從句，其動(dòng)詞既可以是延續(xù)性動(dòng)作的動(dòng)詞，也可以是瞬間性動(dòng)作的動(dòng)詞,如：

　　_________ the students heard the teacher's footsteps, they all stopped talking.

　　當(dāng)學(xué)生們聽到老師的腳步聲時(shí)，他們都停止了講話。(從句動(dòng)作發(fā)生在前)

　　② as"當(dāng).......時(shí)候"或"一邊.......一邊"引導(dǎo)的時(shí)間狀語從句其動(dòng)詞的動(dòng)作是延續(xù)性的，而且側(cè)重表示主句和從句的動(dòng)作并相發(fā)生：

　　We were having breakfast __________ she was combing her hair.

　　她梳頭時(shí)我們?cè)诔栽顼垺?br />
　　③ while表示"在某一段時(shí)間里"或"在……期間"，其所引導(dǎo)的從句的動(dòng)作是延續(xù)性的，并側(cè)重表示和主句的動(dòng)作同時(shí)發(fā)生。如：

　　I can learn ________ I work.

　　我可以邊工作邊學(xué)習(xí)。

　　用when, as, while填空：

　　________ you came in, I was talking with a few boys.

　　It started to rain __________ we were playing outdoors.

　　They talked _________ they walked down the river.

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