whenwhile用法

1、whenwhile用法whenwhile用法 编辑整理：尊敬的读者朋友们：这里是精品文档编辑中心，本文档内容是由我和我的同事精心编辑整理后发布的，发布之前我们对文中内容进行仔细校对，但是难免会有疏漏的地方，但是任然希望（whenwhile用法）的内容能够给您的工作和学习带来便利。同时也真诚的希望收到您的建议和反馈，这将是我们进步的源泉，前进的动力。本文可编辑可修改，如果觉得对您有帮助请收藏以便随时查阅，最后祝您生活愉快 业绩进步，以下为whenwhile用法的全部内容。when和while的用法和区别while和when都是表示同时,到底句子中是用when还是while主要看从句和主句中所使用

2、的动词是短暂性动作（瞬时动词）还是持续性动作.1、若主句表示的是一个短暂性的动作，而从句表示的是一个持续性动作时，两者都可用。如：he fell asleep when while he was reading. 他看书时睡着了。i met him when while i was taking a walk in the park. 我在公园散步时遇到了他。2、若主、从句表示两个同时进行的持续性动作，且强调主句表示的动作延续到从句所指的整个时间，通常要用 while。如：dont talk while youre eating。 吃饭时不要说话。i kept silent while he

3、was writing。 在他写的时候，我默不作声。3、若从句是一个短暂性动作，而主句是一个持续性动作,可以 when 但不用 while。如：when he came in， i was listening to the radio。 他进来时,我在听收音机。it was raining hard when we arrived. 我们到达时正下着大雨。4、若主、从句表示的是两个同时(或几乎同时)发生的短暂性动作，一般要用 when.如：i thought of it just when you opened your mouth。 就在你要说的时候，我也想到了。如果是进行时态,一般是持续性

4、的。如果是过去式,一般是短暂性动作。对于，填写when还是while的问题，通常首先看主句和从句中的时态，再根据以上4个规律来判断填写那个单词。主句 从句短暂性 when/while 持续性（过去时) （过进：was/were +doing）he fell asleep when while he was reading。持续性 while 持续性（一般现在/过去时） （过进：was/were +doing）dont talk while youre eating. i kept silent while he was writing。 (现进：am/is/are +doing) （现进:am

5、/is/are +doing）（过进：was/were +doing） （过进：was/were +doing）i was watching tv while my mother was cooking （动作同时发生）持续性 when 短暂性（过进：was/were +doing) （过去时)i was listening to the radio when he came in。短暂性 when 短暂性（过去时） （过去时）i thought of it just when you opened your mouth。用when或while 填空1_ tom was eating supp

6、er， it began to rain outside。2 dont use your phone_ you are driving a car。3 what were you doing _ mr. zhou came in ？4 jim is good at math _ mary is good at english.5 we were watching tv _ the electricity was off.6 _peter was sleeping； a thief broke into his house。7 it snowed _ we arrived in tokyo。8

7、she left her hometown_ she was five.9 i was studying in the library_ the ufo landed选用when或while填空。1。 my wallet dropped on the ground_ i was walking.2. _ i was falling asleep there was a loud knock on the door.3. _ he was reading， the telephone rang.4。 were the students listening to the teacher caref

8、ully _ the teacher was giving a lesson?5。 _ the telephone rang， i was doing my homework.6。 was she playing games _ the bell was ringing？7. the days get longer _ spring comes.8。 lucy was listening to the radio _ lily was watching tv.9. _ we were batting on the lake， we saw a fish jump out of the wate

9、r.10。 they have their pe lesson indoors _ it rains。用when, while填空：1。 i was listening to the radio _ he came in。2. _ the teacher came in, we were talking。3. _ he came back, i was doing some washing.4。 i was cooking dinner _ they came home。5. he fell asleep _ he was reading.6. he asked me a question _ i was speaking。7.