生、主从句一前一后发生三类句型,每种句型分别对应独特的句式过去类:….过去进行when 一般过去现在类:…现在进行… when 一般现在过去类:过去将来when 一般过去现在类:一般将来when 一般现在过去完成when 一般过去7当我在开车时,她在玩滑板车。While?I?was?driving,?she?was?playing?the?scooter.时间状语从句8?(1)时间状语从句常用when, as, while, before, after, since, till, until, as soon as等连词来引导。例如:?It was raining hard when got to school yesterday.?While he was doing his homework, the telephone rang.?As he walked along the lake, he sang happily.?He had learned a little Chinese before he came to China.?After he finished middle school, he went to work in a factory.9?(2)在时间状语从句里,主句为将来时,从句用一般现在时?I’ll ring you up as soon as I get to New York.?I will tell him everything when es back.?He won’t believe it until he sees it with his own eyes.?(3)若就时间状语从句提问,应用when 来提问。如:?While we were sweeping the floor, the bell rang. (就划线部分提问10
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