when和while区别及专项练习-含答案

when 和 while 用法区别专项练习讲解三例句：1. The girls are dancing while the boys are singing.2. Kangkang s mother is cooking when he gets home.3. When/While Kangkang s mother is cooking, he gets home.一、用 when 或者 while 填空1._ Margo was talking on the phone, her sister walked in.2._ we visited the school, the children were playing games.3._ Sarah was at the barber s, I was going to class.4._ I saw Carlos, he was wearing a green shirt.5._ Allen was cleaning his room, the phone rang.6._ Rita bought her new dog; it was wearing a little coat.7. He was driving along _ suddenly a woman appeared.8. _ Jake was waiting at the door, an old woman called to him.9. He was reading a book _suddenly the telephone rang.10. _ it began to rain, they were playing chess.二、用所给动词适当形式填空11.While Jake _ (look) for customers, he _ (see) a woman.12.They _(play) football on the playground when it _(begin) to rain.13. A strange box _ (arrive) while we _ (talk).14. John _ (sleep) when someone _ (steal) his car.15.Father still(sleep) when I(get) up yesterday morning.16.Grandma(cook) breakfast while I(wash) my face this morning.17.Mother(sweep) the floor when I(leave) home.18.I(read) a history book when someone(knock) at the door.19.Mary and Alice are busy(do) their homework.20.The teacher asked us(keep) the windows closed.21. I followed it(see) where it was going.22.The students(play)basketball on the playground from 3 to 4yesterday afternoon.三、完成下面句子，词数不限1.飞机在伦敦起飞时正在下雨。Itwhen the planein London.2.你记得汶川大地震时你在做什么吗？Do you remember whatyouwhen Wenchuan Earthquake.3.当铃声想起的时候，我们正在操场上玩得很开心。Weon the playground when the bell.4.当妈妈下班回家时，你在做什么？when Mumfrom work?5.当我在做作业时，有人敲门。I was doing my homework, someonethe door.6.当外星人正在买纪念品的时候，那个女孩报了警。the alien was buying the souvenirs, the girlthe police.答案：1.while 2.when 3.while 4.when 5.while 6.when 7.When 8.While 9.When 10.When11.was looking ,saw 12.were playing,began 13.arrived, were talking 14.was sleeping, stole15.was,sleeping got 16.was cooking, was washing 17.was sweeping,left 18,was reading,knocked 19,doing 20.to keep 21. to see 22.were playing1. was raining, took off2. were doing ,took place3. were having fun, rang4. what were you doing ,came back home5. while /when, knocked at6. while, called