1、Book 3 Unit 2 难句解析1. Something terrible must have happened if Li Chang was not coming to eat in his restaurant as he always did. (P10)must have done 表示对发生在过去的事情的肯定的推测。如：The classroom is empty. I think they must have gone to the library. 教室空了，我想他们一定去图书馆了。The ground is wet. It must have rained last ni
2、ght. 地面湿了，昨天夜里一定是下雨了。【拓展】 must do / be 是对现在或将来的事情表示推测；而must be doing则是对正在进行的事情表示推测。如:Dont call him. He must be sleeping at the moment. 别给他打电话了，此刻他一定正在睡觉。Though Ive never seen you before, I guess you must be the new secretary. 我以前没见过你，但我猜你一定是新来的秘书。【练习】 完成句子：1) He _ (他一定病了). He looks so pale.2) I cant
3、 find my bag.You _ (你准是落在公共汽车上了).2. Their balanced diets became such a success that before long Wang Peng became slimmer and Yong Hui put on more weight. (P15)此句中success 作可数名词，意思是“成功的人或事”；当其作“成功”讲时是抽象名词，不可数。如：He is a great success as a teacher. 作为一名教师，他很成功。Both plans have been tried without success.
4、 两个计划都已试过但未成功。【练习】 完成句子：3) They didnt _ (没取得多大成就).4) Hes proud of _ (女儿的种种成就).3. Wang Peng was enjoying a second plate of dumplings so he sighed. (P15)“a + 序数词” 表示“另一，再一”。如：He has tried twice, and he is asked to have a third try. 他已经试过了两次，现在他请求再试一次。Would you like a second cup of tea? 您要再来一杯茶吗？【拓展】 “
5、the + 序数词”表示顺序。如：Shanghai is the second largest city in China. 上海是中国第二大城市。She is in the third row. 她坐在第三排。【练习】 完成句子：5) They have_（他们另有一栋房子）.6) We need _（另一双鞋子）. One is not enough. 参考答案1) must be ill 2) must have left it on the bus 3) have much success in life 4) his daughters successes5) a second house 6) a second pair of shoes
