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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.,