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选修6《Grammar Summary》集体备课教案优质课下载
When ---当……时候,主句与从句的动作同时发生，接时间点或时间段
Eg：When I came home, I met an old schoolmate of mine.
While ---在……期间，只能接时间段
Eg：While we were talking, he came in.
As --- 一边……一边, 随着，通常用进行时
Eg：She was doing her homework as she was listening to the music.
②the moment ：做连词用，一……就，=as soon as , immediately
Eg：I gave her the moment I saw her.
③Not… until --- 直到……才 可以和 when 互换
Eg：He didn’t leave the office until he finished the work.=He left the office when he finished the work.
④before：It was /will be …before… 是常用句型
Eg：It was not long before I forgot it all.
⑤Since ---自从……, 通常主句用现在完成时 It is /has been… since…是常用句型
Eg：I have never been there again since I graduated from the university.
⑥No sooner than --- 一……就……用于句首要求倒装
Eg：No sooner had he arrived than he went away again.
类比：Hardly（Scarcely） …when…
⑦Once --- 一但……就……
Eg：Once you see him, you will never forget him.
⑧Every time, each time 每次 做连词用
Eg：Each time he came to town, he would visit our school.
4、条件状语从句：If, unless, as long as, in case, provided that, on condition that
①If ---如果 ；②Unless --- 如果不, 除非=if not ； ③As long as --- 只要 ；④As (so) far as --- 据……所知；
⑤In case --- 假使, 如果
Eg：The plane cannot take off in case it rains.