初中英语时间状语从句.pptVIP

# # # # # # # # # # 初中英语时间状语从句 类型 1.时间状语从句 2.地点状语从句 3.条件状语从句 4.原因状语从句 5.结果状语从句 6.目的状语从句 7.让步状语从句 8.方式状语从句 9.比较状语从句 时间状语从句 定义：在句子中起时间状语作用的句子称为时间状语从句，可放在句首或者句尾。 时间状语从句 　　 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/until（直到）， not...until (直到...才） whenever（无论何时）， as soon as（一……就）等。 延续性动词 表示能够延续的动作，这种动作可以延续下去或产生持久影响。如：study, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。 终止性动词 也称非延续性动词、瞬间动词或点动词，表示不能延续的动作,这种动作发生后立即结束。 如:open, die, close, begin, finish, come, go, move, borrow, lend, buy,arrive，reach，fall，give，join，marry等。 when 由“when” 引导的从句：表示主句的动作和从句的动作同时发生，或从句的动作发生在主句动作之前。其谓语动词可以是延续性的,也可以是非延续性的, 例：1. I was going out when a visitor came. (我正要出门，有客人来访。)(动词同时发生。) 2. I shall tell her the good news when she comes. 3.When he was a child ，he was always trying out new ideas. while while 引导的从句：表示“当……过程中”，强调某一段时间内主句和从句中谓语动词所表示的动作在同一时期发生。由于while从句表示一个持续的行为，所以从句中要用持续性动词，并且持续性动词常用进行时态。 例： Keep an eye on my little sister while I am away. (我不在时，请照看一下我的小妹妹。) While we were watching TV, Jim came in. ?Strike?while?the?iron?is?hot.?趁热打铁。 While my wife was reading the newspaper, I was watching TV. While Jim was mending his bike, Lin Tao came to see him. While they were talking, the bell rang. You can’t do your homework while you’re watching TV. as 由as引导的时间状语从句，[表示时间]当..., 的时候 , 一边...一边, 随着。 如： 1. She sang as she worked. 她一边工作一边唱歌。 2. I saw him as he was getting off the bus. 正当他下公共汽车时, 我看见了他。 3. As a child, he lived in America. 他小时候住在美国。 4. You will grow wiser as you grow older. 随着你年令的增长, 你会变得更聪明。 As?the?time?went?on,the?weather?got?worse.??? ?The?atmosphere?gets?thinner?and?thinner?as?the?height?increases.?????? ??3.?As?years?go?by, China?is?getting?stronger?and?richer.??????? 猜一猜：As a boy,he likes to playing basketball. I like playing basketball,while he likes playing the piano. when、while （一）、w