新概念第一册L1--73的词组搭配

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1、变否定句规则变否定句规则一、一般现在时变否定句的规则. (a) 含有 am is are 的句子,变否定句时, 只需在am is are 后加not. 例1 This is a book. 否定句 This is not a book . 例2 I am a teacher . 否定句I am not a teacher . 例3 These are pens . 否定句These are not pens .(b) 含有实义动词的句子，变否定句分两步。 （1）如果主语是第三人称单数时，要在实义动词前加doesnt,后面的动词用原形。 例1 He eats an apple. 否定句 He d

2、oesnt eat an apple. 例2 Jim does his homework. 否定句 Jim doesnt do his homework. 例3 Marry goes to school. 否定句Marry doesnt go to school. (2) 如果主语不是第三人称单数时，只需在实义动词前加dont. 例1 I teach English. 否定句 I dont teach English. 例2 They go to school. 否定句 They dont go to school. 例3 We sing a song. 否定句 We dont sing a

3、song. (c) 含有情态动词的句子,变否定句时,只需在情态动词后加not. 例1 I can dance. 否定句 I can not dance.或 I cant dance. 例2 They can speak English. 否定句 They can not speak English. 或 They cant speak English. 例3 He must go home. 否定句 He must not go home. 或 He mustnt go home. 例4 He must be on the playground. He can not be on the pl

4、ayground. 析：当must be用来表示推测，有“一定”的含义时， 否定式要用can not. 例5You must say something at the mecting. You neednt say anything at the mecting. 析：当“must+行为动词”用来表示“必须”的含义时， 其否定式可用neednt 或mustnt表示“不需要”，“不必”， 语气委婉，must not表示“禁止”，“千万别”语气生硬。 例6 You may come in now. You mustnt come in now. 析：may作为情态动词表示“可以”时， 其否定式用m

5、ust not,而不用may not. 例7 He may watch TV . He mustnt watch TV. 注意: (1) 见到some 变否定句时,要换成any. 例1 I eat some apples. 否定句 I dont eat any apples. 例2 He has some books. 否定句 He doesnt have any books.例3 He does his home work. 否定句 He doesnt do his home work. (2) 见到and 变否定句时,要换成or. 例1 There is some air and wate

6、r on the moon. 否定句 There isnt any air or water on the moon. 例2 He has some brothers and sisters. 否定句 He hasnt any brothers or sisters. 例3 He eats apples and oranges. 否定句He doesnt eat apples or oranges. (3) 见到too和also变否定句时,要换成either. 例1. Tom goes to school too. 否定句 Tom doesnt go to school either. too

7、和also用于肯定句中时，否定句中用either替换。 （4）见到already变否定句时,要换成yet。 例1 He has had supper already. He hasnt had supper yet. 随着对谓语动词的否定，某些副词也要作相应的变动。 英语句型转换错误分析：肯定句变否定句 1. I think she is there. 误：I think she isnt there. 正：I dont think she is there. 析：英语中think, believe, expect, suppose等表示信念和揣测的动词， 后接that从句时，习惯上将从句中的

8、否定形式转移到主句上， 即否定主句谓语，不否定从句谓语。2. He can sing this song and that one. 误：He can not sing this song and that one. 正；He can not sing this song or that one. 析：肯定句中的连词and在否定句中一般要改为or。3. Tom went to school too. 误：Tom didnt go to school too. 正：Tom didnt go to school either. 析：too和also用于肯定句中时，否定句中用either替换。4.

9、He has had supper already. 误：He hasnt had supper already. 正：He hasnt had supper yet. 析：随着对谓语动词的否定，某些副词也要作相应的变动。 5. He had a good rest just now. 误：He hadnt a good rest just now. 正：He didnt have a good rest just now. 析：have在表示开会、吃饭、休息、进行体育锻炼等词组中是行为动词， 否定句用助动词来完成。 6. Lets do it. 误：Lets dont do it. 正：Do

10、nt lets do it.或Lets not do it. 析：let后接的是不带to的不定式，变为否定式， 直接在句首前加Dont或在不定式前加not。7. He always gets there on time. 误：He doesnt always get there on time. 正：He never gets there on time. 析：He doesnt always get there on time意为 “他并非老是准时到那儿”，是部分否定， 习惯上把句中的副词改为相应的表示否定的副词即可。如： It often rains here. It seldom rai

11、ns here.8. Be here early tomorrow. 误：Be not here early tomorrow. 正：Dont be here early tomorrow. 析：祈使句的否定，一般在谓语动词前加do not的缩写dont。9. You had better come. 误：You didnt have better come. 正：You had better not come. 析：had better相当于一情态动词，不可分割， 因此not应放在其后。would rather也是如此。10. Both Tom and Xiao Ping went to s