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1、豌豆语法时间状语从句,豌豆群：7298916,概念在复合句中，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。）.由when,while,just,just as,as，after,before,since,until,引导的时间状语从句。例如：When you think you know nothing,then you begin to know something。Strike while the iron is hot.趁热打铁。You can feel the air moving as your hand pushes throu
2、gh it.Our headmaster laughed as she spoke.,豌豆YY交流群：7298916,一、when,while和as的区别 1when导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。并且when有时表示“就在那时”。When she came in,I stopped eatingWhen I lived in the countryside,I used to carry some water for him.We were about to leave when he came in.2while导的从句的谓语动作必须是延续性的，并强调主句和从句的动
3、作同时发生（或者相对应）。并且while有时还可以表示对比。例如：While my wife was reading the newspaper,I was watching TV.I like playing football while you like playing basketball.,豌豆YY交流群：7298916,3As示“一边一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生；as也可以强调“一先一后。例如：We always sing as we walk.As we were going out,it began to snow.,豌豆YY交流群：729
4、8916,二、由before和after引导的时间状语从句。注意before引导的从句不再用否定式的谓语，并且当before引导的从句位于主句之后，有时译成“就，才”。还要注意主句和从句之间的时间关系。当主句用将来时，从句总是用现在时；如果before引导的主句谓语用的是过去完成时，则从句动词多用一般过去时，这样以便体现动作发生的先后。After表示主句动作发生在从句动作之后。主句和 从句的动作的时间关系正好与before引导的从句相反。例如：It will be four days before they come back.My father had left for Canada jus
5、t before the letter arrived.They had not been married four months before they were divorced.After you think it over,please let me know what you decide.After we had finished the work,we went home.,豌豆YY交流群：7298916,三.由till或until引导的时间状语从句。till和until一般情况下两者可以互换，但是在强调句型中多用until。并且要注意的是：如果主句中的谓语动词是瞬时动词时，必须
6、用否定形式；如果主句中的谓语动词是延续性动词时，用肯定或否定形式都可以，但表达的意思不同。till不可以用在句首，而until可以放在句首。例如：I didnt go to bed until（till）my father came back.It was not until the meeting was over that he began to teach me English.I worked until he came back.I didnt work until he came back.Please wait until I arrived.,豌豆YY交流群：7298916,四
7、、由since引导的时间状语从句。since引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。一般情况下，从句谓语动词用一般过去时，而主句的谓语动词用现在完成时。但在It is+时间+since从句的句型中，主句多用一般过去式。例如：I have been in Beijing since you left.Where have you been since I last saw you?It is four years since my sister lived in Beijing.It is five months since our boss was in Beijing.It
8、 is+since+从句，当从句中的动词为延续性的，那么翻译成，自打.不。多长时间了，当动词为非延续性的，则翻译成自从。已经多长时间了,豌豆YY交流群：7298916,五.由as soon as,immediately,directly,instantly,the moment,the instant,the minute,等引导的时间状语从句。这些连词都表示“一就”。例如：I will go there directly I have finished my breakfast.The moment I heard the news,I hastened to the spot.As soo
9、n as I reach Canada,I will ring you up.注意：hardly(scarcely,rarely)when/before,no soonerthan相当于as soon as之意。主句用过去完成时，从句用一般过去时。当hardly,scarcely,rarely和no sooner位于句首时，主句应用倒装语序。He had no sooner arrived home than he was asked to start on another journey.No sooner had the sun shown itself above the horizon
10、 than he got out of bed to commence work.Hardly had I sat down when he stepped in.He had hardly fallen asleep when he felt a soft touch on his shoulder.,豌豆YY交流群：7298916,六.由by the time引导的时间状语从句。注意时态的变化：在一般情况下，如果从句的谓语动词用一般过去时，主句的谓语动词用过去完成时；如果从句的谓语动词用一般现在时，主句的谓语动词用将来完成时。例如：By the time you came back,I h
11、ad finished this book.By the time you come here tomorrow,I will have finished this work.七.由each time,every time和whenever引导的时间状语从句。Each time he came to Harbin,he would call on me.Whenever that man says“To tell the truth”,I suspect that hes about to tell a lie.You grow younger every time I see you.,豌豆YY交流群：7298916,8.由as long as和so long as引导的时间状语从句。这两个连词表示“只要“例如：You can go where you like as long as you get back before dark.I will fight against these conditions as long as there is a breath in my body!,豌豆YY交流群：7298916,豌豆YY交流群：7298916,
