人教新课标高一英语必修三 Unit 2 Healthy eating 难句解析教案

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 night. 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:
Don’t 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 I’ve 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 can’t 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. 两个计划都已试过但未成功。
【练习】 完成句子：
3) They didn’t _____________ (没取得多大成就).
4) He’s 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】 “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 daughter’s successes
5) a second house 6) a second pair of shoes