when和while的用法ppt课件
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•如:marry,close, die,jump,buy, borrow,start等
注:若表示状态和持续 性动作时,必须用持续 性动词。
.
when和whiHale Waihona Puke Baidue的区别
• ①when是at or during the time that, 既指时间点, 也可指一段时间; while是during the time that, 只指一段时间,因此when引导的时间状语从句中 的动词可以是终止性动词,也可以是延续性动词, 而while从句中的动词必须是延续性动词。
• ②Sorry,I was out when you called me.(call 为短暂性动词)对不起,你打电话时我刚好外出 了。
• ③Strike while the iron is hot.(is为延续性动词, 表示一种持续的状态)趁热打铁。
。
.
• 二、when从句的谓语动词可以在主句谓语动作之前、之 后或同时发生;while从句的谓语动作必须是和主句谓语 动作同时发生。
• ②when 说明从句的动作和主句的动作可以是同 时,也可以是先后发生;
• while 则强调主句的动作在从句动作的发生的过程 中或主从句两个动作同时发生。
.
• ③由when引导的时间状语从句,主句用过 去进行时,从句应用一般过去时;
• 如果从句和主句的动作同时发生,两句都 用过去进行时的时候,多用while引导,如: a. When the teacher came in, we were talking. 当此句改变主从句的位置时,则为: While we were talking, the teacher came in. b. They were singing while we were dancing.
.
持续性动词(或称为 “延续性动词”) •表示的动作是一种延续 的动作,这种动作可以 延续下去或者产生持久 的影响。
.
如:learn,work, stand,lie,know, walk,have等
.
终止性动词 (非延续性)
• 表示的动作不能延续,
即动作结束后立即结束,
产生某种结果。在有了 某种结果之后,动作就 不能再继续下去。
初中英语微课录制
When和while的用法区别
胡庙一中 刘艳
.
一.终止性动词&持续性(延 续性和非延续性)动词:
1.概念 2.区别 二.When和while用法的 1.区别 2.举例
.
终止性动词&持续性动词的 区别
• 英语中表示动作的动词, 按其动作发生过程的长 短,可分为持续性动词
和终止性动词。
.
课堂练习
• 用when,while填空
• 1. _W___h_i_l_e___ the alien was in the museum , I
called the police . • 2. The boy was walking down the street
___w__h_e__n__ a UFO landed . • 3. _W__h__il_e____ the alien was visiting the museum ,
.
• When和while引导时间状语从句的区别
• 一、when可以和延续性动词连用,也可以和短暂 性动词连用;而while只能和延续性动词连用。
• ① Why do you want a new job when youve got such a good one already?(get为短暂性动词) 你已经找到如此好的工作,为何还想再找新的?
• 1.从句动作在主句动作前发生,只用 when。 • ①When he had finished his homework,he took a short
rest.(finished先发生)当他完成作业后,他休息了一会 儿。 • ②When I got to the airport,the guests had left.(got to后发生)当我赶到飞机场时,客人们已经离开了。 • 2.从句动作和主句动作同时发生,且从句动作为延续性 动词时,when,while都可使用。 • ①When /While we were dancing,a stranger came in.(dance为延续性动词)当我们跳舞时,一位陌生人 走了进来。 • ②When /While she was making a phonecall,I was writing a letter.(make为延续性动词)当她在打电话时, 我正在写信。
the boy called the TV station .
• 4. I was cleaning my roomw__h_e_n____ the fire broke out . While
• 5. __________ Linda was shouting his name , some people looked at her .
.
3.在将来时从句中,常用when,且从句须 用一般时代替将来时。
• ①You shall borrow the book when I have finished reading it.在我读完这本书后,你 可以借阅。
• ②When the manager comes here for a visit next week,Ill talk with him about this.下周,经理来这参观时,我会和他谈 谈此事。
.
• ④when和while 还可作并列连词。 • when表示“在那时”; • while表示“而,却”,表对照关系。 • 如: a. The children were running to move
the bag of rice when they heard the sound of a motor bike. 孩子们正要跑过去搬开那 袋米,这时他们听到了摩托车的声音。 • b. He is strong while his brother is weak. 他长得很结实,而他弟弟却很瘦弱。
•如:marry,close, die,jump,buy, borrow,start等
注:若表示状态和持续 性动作时,必须用持续 性动词。
.
when和whiHale Waihona Puke Baidue的区别
• ①when是at or during the time that, 既指时间点, 也可指一段时间; while是during the time that, 只指一段时间,因此when引导的时间状语从句中 的动词可以是终止性动词,也可以是延续性动词, 而while从句中的动词必须是延续性动词。
• ②Sorry,I was out when you called me.(call 为短暂性动词)对不起,你打电话时我刚好外出 了。
• ③Strike while the iron is hot.(is为延续性动词, 表示一种持续的状态)趁热打铁。
。
.
• 二、when从句的谓语动词可以在主句谓语动作之前、之 后或同时发生;while从句的谓语动作必须是和主句谓语 动作同时发生。
• ②when 说明从句的动作和主句的动作可以是同 时,也可以是先后发生;
• while 则强调主句的动作在从句动作的发生的过程 中或主从句两个动作同时发生。
.
• ③由when引导的时间状语从句,主句用过 去进行时,从句应用一般过去时;
• 如果从句和主句的动作同时发生,两句都 用过去进行时的时候,多用while引导,如: a. When the teacher came in, we were talking. 当此句改变主从句的位置时,则为: While we were talking, the teacher came in. b. They were singing while we were dancing.
.
持续性动词(或称为 “延续性动词”) •表示的动作是一种延续 的动作,这种动作可以 延续下去或者产生持久 的影响。
.
如:learn,work, stand,lie,know, walk,have等
.
终止性动词 (非延续性)
• 表示的动作不能延续,
即动作结束后立即结束,
产生某种结果。在有了 某种结果之后,动作就 不能再继续下去。
初中英语微课录制
When和while的用法区别
胡庙一中 刘艳
.
一.终止性动词&持续性(延 续性和非延续性)动词:
1.概念 2.区别 二.When和while用法的 1.区别 2.举例
.
终止性动词&持续性动词的 区别
• 英语中表示动作的动词, 按其动作发生过程的长 短,可分为持续性动词
和终止性动词。
.
课堂练习
• 用when,while填空
• 1. _W___h_i_l_e___ the alien was in the museum , I
called the police . • 2. The boy was walking down the street
___w__h_e__n__ a UFO landed . • 3. _W__h__il_e____ the alien was visiting the museum ,
.
• When和while引导时间状语从句的区别
• 一、when可以和延续性动词连用,也可以和短暂 性动词连用;而while只能和延续性动词连用。
• ① Why do you want a new job when youve got such a good one already?(get为短暂性动词) 你已经找到如此好的工作,为何还想再找新的?
• 1.从句动作在主句动作前发生,只用 when。 • ①When he had finished his homework,he took a short
rest.(finished先发生)当他完成作业后,他休息了一会 儿。 • ②When I got to the airport,the guests had left.(got to后发生)当我赶到飞机场时,客人们已经离开了。 • 2.从句动作和主句动作同时发生,且从句动作为延续性 动词时,when,while都可使用。 • ①When /While we were dancing,a stranger came in.(dance为延续性动词)当我们跳舞时,一位陌生人 走了进来。 • ②When /While she was making a phonecall,I was writing a letter.(make为延续性动词)当她在打电话时, 我正在写信。
the boy called the TV station .
• 4. I was cleaning my roomw__h_e_n____ the fire broke out . While
• 5. __________ Linda was shouting his name , some people looked at her .
.
3.在将来时从句中,常用when,且从句须 用一般时代替将来时。
• ①You shall borrow the book when I have finished reading it.在我读完这本书后,你 可以借阅。
• ②When the manager comes here for a visit next week,Ill talk with him about this.下周,经理来这参观时,我会和他谈 谈此事。
.
• ④when和while 还可作并列连词。 • when表示“在那时”; • while表示“而,却”,表对照关系。 • 如: a. The children were running to move
the bag of rice when they heard the sound of a motor bike. 孩子们正要跑过去搬开那 袋米,这时他们听到了摩托车的声音。 • b. He is strong while his brother is weak. 他长得很结实,而他弟弟却很瘦弱。