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课件网) Unit Music Language points 1. Imagine having the opportunity to sing together with hundreds of other people while you are at home alone. 想象一下，独自在家时，你可以和几百个人一道引吭高歌。 Think: while引导什么从句？while是什么意思？ George came in while the discussion was still going on. While I admit his good points, I can see his bad habits. While there is life, there’s hope. Some people waste food while others haven’t enough. 时间状语从句，while“当……时候” 让步状语从句，while“尽管” 条件状语从句，while“只要” while 连词，表示对比，“然而” While I enjoy the book with some nice pictures, I don’t have enough money to buy it. 虽然我喜欢这本有一些漂亮图画的书，但是我没有足够的钱买它。 Generally, sweet apples are eaten fresh while tart apples are used to make applesauce. 一般说来，甜苹果生吃，而酸苹果则用来制作苹果酱。 【句式拓展】 【温馨提示】当while从句中的主语与主句主语一致，且从句含be动词时，可省略从句的主语和be动词。 While waiting for the bus, he caught sight of an old friend. 等公共汽车时他看到了一位老朋友。 While reading in bed, she fell asleep. 躺在床上看书时她睡着了。 Exercise 1. We were swimming in the lake _____ suddenly the storm started. A. when B. while C. until D. before 2. He was about to tell me the secret _____ someone patted him on the shoulder. A. as B. until C. while D. when 3. He made a mistake, but then he corrected the situation _____ it got worse. A. until B. when C. before D. as 4. I’ll write to you _____ I get there. A. while B. before C. as soon as D. by 5.-- Was his father strict with him when he was at school -- Yes. He had never praised him _____ he became one of the top students in his grade. A. after B. unless C. until D. when 6. He was about to tell me the secret _____ someone patted him on the shoulder. A. as B. until C. while D. when A D C C C D 7. He has lived in the city _____ he came back from America. A. when B. before C. since D. after 8. We won’t leave here _____ our teacher comes back. A. until B. since C. after D. as soon as 9. I had to finish the picture _____ my mother came back. A. until B. before C. after D. while 10. John fell asleep _____ he was listening to the music. A. after B. before C. while D. as soon as C A B C 用括号内动词的正确形式填空 1.My mother _____ (cook) dinner when I _____ (get) home last night. 2.I _____ (meet) Lingling when I _____ (walk) along the street. 3.Lily _____(listen) to music while Lucy _____ (read) a story book. 4.When the teacher _____ (come) in, the students _____ (talk). 5.He _____ (call) you as soon as he ____ (get) to Guangdong. was cooking got met was walking was listening was reading came were talking will call gets 辨析 while强调某段时间内一种情况发生时，另一种情况出现，“当…时候”。 as强调同时性，一件事情发生，另一件事情立刻发生“一边…一边…”。 即学即用 1. She thought I was talking about her daughter, _____, in fact, I was talking about my daughter. 2. — I’m going to the post office ... ...
