when和while区别及练习.pdf

讲解三例句： 25. Mary and Alice are busy (do) their homework. 1.The girls are dancing while the boys are singing. 26. The teacher asked us (keep) the windows closed. 2. Kangkang ’smother is cooking when he gets home. 27. I followed it (see) where it was going. 3. When/While Kangkang ’s mother is cooking, he gets home. 28. The students (play) basketball on the playground from 3 to 4 一、用 when 或者 while 填空 yesterday afternoon. 1.______ Margo was talking on the phone, her sister walked in. 三、完成下面句子，词数不限 2.______ we visited the school, the children were playing games. 1.飞机在伦敦起飞时正在下雨。 3.______ Sarah was at the barber I was going to class.’s, It when the plane in London. 4.______ I saw Carlos, he was wearing a green shirt. 2.你记得汶川大地震时你在做什么吗？ 5.______ Allen was cleaning his room, the phone rang. Do you remember what you when Wenchuan Earthquake . 6.______ Rita bought her new dog; it was wearing a little coat. 3.当铃声想起的时候，我们正在操场上玩得很开心。 1. He was driving along ________ suddenly a woman appeared. We on the playground when the bell . 2. _____ Jake was waiting at the door, an old woman called