肯定句变否定句[青苗教育]

1、肯定句变否定句肯定句变否定句 1技能教育 1.I am a student. I am not a student. 2.You are sad. You are not sad. 3. She is a good girl. She is not a good girl. 4.Yesterday was Monday. Yesterday was not Monday. 5.They were busy yesterday. They were not busy yesterday. 2技能教育 1.如果句中有be动词 （ is, am , are, was, were),就在be动词后 面

2、直接加not。 3技能教育 be 动词和not的缩写形式： is not = isnt are not = arent was not = wasnt were not = werent 注意：am not 不能缩写。 4技能教育 1. He is a boy. He is not a boy. 2. I am your friend. I am not your friend. 3. My sister is a beatiful girl. My sister is not a beatiful girl. 5技能教育 5.There are some books on the books

3、helf. There are not any books on the bookshelf. 6. I was at home yesterday. I was not at home yesterday. 7. They were in Beijing ten years ago. They were not in Beijing ten years ago. 6技能教育 注意：句中有 some,一般要改为 any. 7技能教育 1.I can swim. I can not swim. 2.You will go to the park. You will not go to the p

4、ark. 3. Peter need go home now. Peter need not go home now 8技能教育 4. You should open your book. You should not open your book. 5. He must finish his homework. He must not finish his homework. 9技能教育 2.如果句中有 （can ,may,must,should , need, will等），就在这些单 词后面直接加not。 10技能教育 can not = cant must not = mustnt s

5、hould not = shouldnt need not = neednt will not = wont 11技能教育 1. Lucy will be back in a week. Lucy wont be back in a week. 2. You can use the dictionary. You cant use the dictionary. 3. Peter need go home now. Peter neednt go home now . 4. You should say “Sorry”. You shouldnt say “Sorry”. 5. He must

6、 stay at home . He mustnt stay at home . 12技能教育 3.如果句中没有be动词，也 没有情态动词，就 要借助（dont, doesnt, didnt）来帮忙。 13技能教育 当句中的动词是原形 时，在动词前直接加 dont。 I like English. I dont like English. You have dinner. You dont have dinner. 14技能教育 肯定祈使句变否定祈使句，也是肯定祈使句变否定祈使句，也是 在动词前加直接在动词前加直接dont.dont. 3. Have some bread, Tom. 3. H

7、ave some bread, Tom. Dont have any bread ,Tom. Dont have any bread ,Tom. 4. Please open your books. 4. Please open your books. Please dont open your Please dont open your books. books. 15技能教育 当句中的动词是第三人称单数时， 在动词前加doesnt ，动词还原原形。 She likes singing. She doesnt like singing. She does her homework. She

8、doesnt do her homework. 16技能教育 当句中的动词是过去式时,在动 词前加didnt，动词还原原形。 We had a great time last year. We didnt have a great time last year. I went to school yesterday. I didnt go to school yesterday. 17技能教育 肯定句变否定句肯定句变否定句 练一练练一练 18技能教育 1. I am your friend. _ 2. My mother is a worker. _ 3. There are some boo

9、ks on the bookshelf. _ 4. I was at home yesterday. _ 5. They were in Beijing ten years ago. _ 6.Lucy will be back in a week.Lucy will be back in a week. _ 19技能教育 7.She can sing a song and draw a picture. _ 8. Peter need go home tomorrow. _ 10. We come from China. _ _ 11.He likes the violin. _ 12. Peter did lots of work last night. _ 20技能教育 肯定变否定肯定变否定, ,其实并不难，抓住动词是关键。其实并不难，抓住动词是关键。 BeBe动词，首先看，有它在，动词，首先看，有它在，notnot放在它后面。放在它后面。 Can,may,must,should,need,will,Can,may,must,should,need,will,不一般，不一般， NotNot加在它后面。加在它后面。 以上这些都不见，你就应该小心点，以上这些都不见，你就应该小心点， DontDont站在动原前，站在动原前， Doe