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1、,UNIT 2 Keeping Healthy TOPIC 1 You should brush your teeth twice a day Section B -had better结构的用法,had better (常简略为d better)是一固定词组，had better“最好“，用于表示对别人的劝告、建议或表示一种愿望。,一、had better后面必须跟动词原形。 had better后跟动词原形(即不带to的不定式)，构成had better do sth.句型。,如： 1.你最好立即去医院看病。 2.汤姆，你最好今天去那儿。,1.Youd better go to hospi
2、tal at once. 2.Tom, youd better go there today.,二、had better的否定式。如： 常用的否定形式是将否定副词not直接放在had better的后面。,如： 3.你最好不要错过末班公共汽车。 4.你最好后天不要动身去南京。,3. You miss the last bus.,4. You leave for Nanjing the day after tomorrow.,had better not,had better not,三、had better的疑问式。 had better通常不以普通疑问句的形式出现。但有时用于否定疑问句，常用
3、Hadnt+主语+better.?结构,作为一种劝告形式，常译为：.不认为该.吗？如： 5. take an umbrella?你不认为该带一把伞吗? 6. ask him first?你不认为该先问问他吗?,Hadnt you better,Hadnt you better,四、had better在反意疑问句中。 在反意疑问句中，疑问部分一般用“had+主语？“，但有时可用“will you?“表示一种请求或建议。如： 1.Youd better not go out today ? 今天你最好不要外出，好吗？ 2.I must stay at home this afternoon. Y
4、ou had better come to my house, ?今天下午我必须留在家里，你最好来我家，好吗？,had you,will you,五、had better在表示对别人劝告、建议时，不宜用于与陌生人、长辈及上级的交谈中。 比较有礼貌的说法是： It might be better for you.； It would be better for you. 如： for you to help me，Grandpa. 爷爷，您最好能帮我一下。,It might be better,学以致用,下列各句都有一处错误，请改正。 1.Youd better to wait for me a
5、t the school gate. 2.I have better write to him now. 3.You had not better go there.,（去掉to）,（have应改为had）,（将not置于better后面）,学以致用 Work in pairs or groups.Youd better. Make up a dialogue.,Sum it up,1.肯定式： 2.否定式：,had better do sth.,had better not do sth.,Sum it up,3.否定疑问式： 4.反义疑问式：,Hadnt+主语+better.?,.had+主语？/.will you?,Sum it up,5.委婉式：,It might be better for you.； It would be better for you.,Thank you.,
