时间状语从句.doc

初中英语状语从句知识点：时间状语从句连词主要有：when as while before after until as soon as since等。(1)区别when, as, while的用法.when当.时候引导的时间状语从句，其动词既可以是延续性动作的动词，也可以是瞬间性动作的动词,如：_ the students heard the teachers footsteps, they all stopped talking.当学生们听到老师的脚步声时，他们都停止了讲话。(从句动作发生在前) as当.时候或一边.一边引导的时间状语从句其动词的动作是延续性的，而且侧重表示主句和从句的动作并相发生：We were having breakfast _ she was combing her hair.她梳头时我们在吃早饭。 while表示在某一段时间里或在期间，其所引导的从句的动作是延续性的，并侧重表示和主句的动作同时发生。如：I can learn _ I work.我可以边工作边学习。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._ it was raining, the students were playing basketball.Her brother watched TV_ he ate supper.(4) before引导的时间状语从句，指时间上的在之前Ill be back _.你离开之前我就会回来。(5) as soon as表示一就，做题要注意主将从现As soon as we _ (get) there, he _ (tell) us the news.我们一到那，他就会告诉我们那个消息。(7) since引导的时间状语从句，从句的谓语动词通常为一般过去时，主句的谓语动词通常为现在完成时We _ never _ (meet) since we _ (graduate) from the college.大学毕业后我们就再没见过面。(8) till/until引导的时间状语从句 till和until同义，作直到时(为止)解，till多用于非正式文体，until多用于句首;not until通常与after进行转换。如：I wont go with you until(till) I finished my homework.=_.等我做完作业我才和你一起去在复合句中，由时间连接词引导的状语从句叫做时间状语从句。(在复合句中，要注意主句和从句的时态大多都要保持一致。） 1.由when, while, ,just, just as, as， after, before, since, until, 引导的时间状语从句。时间状语主要时态：主现从不限；主过从四过；主将从现。一般现在时 every, sometimes, at , on Sunday,一般过去时yesterday, last week, an hour ago, the other day, in 1982, just now一般将来时 next, tomorrow, in+时间,现在完成时 for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always, recently过去完成时before, by, until, when, after, once, as soon as过去进行时 this morning, the whole morning, all day, yesterday, from nine to ten last evening when, while将来进行时 soon, tomorrow, this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening引导时间状语从句的普通类从属连词有when（当时），while（在期间），as（当，一边一边），before（在之前），after（在之后），since（从以来），till/unti