2025年小升初英语语法之句型变换（一）肯定句变否定句

小升初英语语法之句型转换（一） 肯定句变否定句 1.概述 肯定句：对事物进行肯定判断的句子。 否定句：对事物进行否定判断的句子。 2.口诀巧记忆 有情有be加not, 无情无be求助动，助动动原要牢记，some变any，and变成or 做题方法步骤 一找二断三变形 一找动词；二判断动词类型，属于以下第一类还是第二类；三根据类型变形句子。 （1）有be动词或者情态动词的句子 Note：be动词（am/is/are/was/were); 常见的情态动词（ can/ could/ should/ may/ must/ will/ would/ shall/ need) ①直接在be动词或情态动词后面加not; 缩略写法：is not=isn’t are not=aren’t was not=wasn’t were not= weren’t can not=can’t could not=couldn’t should not= shouldn’t must not= mustn’t will not= won’t would not= wouldn’t shall not= shan’t need not= needn’t ②观察句子中是否有some/and；如果有，将some变成any，and变成or，如果没有，则不用变形。 （2）没有be动词或者情态动词的句子 ①在行为动词前面加上否定助动词（don't；doesn't；didn’t); ②原来的行为动词变为原形； ③观察句子中是否有some/and；如果有，将some变成any，and变成or，如果没有，则不用变形。 特殊：祈使句变否定，行为动词前加don't 即学即练 1一、将下列肯定句改为否定句 1. She can swim. 解析：①找出动词can；②判断can属于情态动词，属于第一类；③有情有be加not，直接在can后加not，可缩写成can’t;④观察句中是否有some/ and.发现没有，因此变换完成。 答案：She can not swim. 或者 She can’t swim. 2. There are some apples. 解析：①找出动词are; ②判断are属be动词，属于第一类；③有情有be加not，直接在are后加not，可缩写成aren’t; ④观察句中是否有some/ and.发现有 some，将some变成any. 答案： There are not any apples. 或者 There aren’t any apples. 3. She did homework last night. 解析：①找出动词did; ②判断did属行为动词，属于第二类；③无情无be求助动，根据did和last night 判断句子是过去式，所以选择助动词didn’t ; ④将句中原动词转变为动词原形，did变为do;⑤观察句中是否有some/ and.发现没有，就不用变形了，把句子连起来。 答案：She didn’t do homework last night. 跟踪训练：将下列肯定句改为否定句 1. Mary likes pandas. __________________________________ 2. Danial played football last night. __________________________________ 3. Mike and John do their homework together every day. _____________________________________________ 4. There is an apple, two bananas and some grapes on the plate. ____________________________________________________ 5. Jane greets her teacher every morning. _________________________________ 6. She can sing and dance. ___________________________ 7. The cat caught some fish yesterday. ______________________________ 8. Mike and Susan put on the show The Emperor’s New Clothes last weekend. _________________________________________________________________ 9. You should drink some water. ________________________________ 10. In western countries, people often have some bread and milk for breakfast in the morning. ____________________________________________________________________________ 11. I will go to Beijing tomorrow. ______________________________ 12. She is a middle school student. ______________________________ 13. Everyone knows you well. _____________________________ 14. I could tell you the truth. _____________________________ 15. She went to school by bus. _____________________________ 16. Listen! Someone is playing the piano. _____________________________ 17. Bring some snacks, please. ______________________________ 18. She bought a new bike for her son. ___________________________________ 19. I saw some boys playing in the park. ____________________________________ 20. It was a terrible day. ____________________________________ 21. Let him run fast. ____________________________________ 22. Be polite, please. ___________________________ 23. I shall be late. ___________________________ 24. There were two squirrels and a bird in the tree. _______________________________________ 25. She woke up her mother this morning. _____________________________________ 26. We need wait for the green man. _____________________________________ 27. There is going to be a concert in Suzhou tomorrow. ____________________________________________ 28. You must look for a zebra crossing. ___________________________________________ 29. The shoes look nice. ____________________________ 30. The child eats a little sweet food at a time. ______________________________________ 31. It is sometimes rainy in the UK. ______________________________________ 32. I kept this book for five days. _____________________________ 33. I did my homework last night. _____________________________________ 答案 1. Mary doesn't like pandas. 2. Danial didn’t play football last night. 3. Mike and John don’t do their homework together every day. 4. There isn’t an apple, two bananas or any grapes on the plate. 5. Jane doesn’t greet her teacher every morning. 6. She can’t sing or dance. 7. The cat didn’t catch any fish yesterday. 8. Mike and Susan put on the show The Emperor’s New clothes last weekend. 9. You shouldn’t drink any water. 10. In western countries, people often don’t have any bread or milk for breakfast in the morning. 11. I won’t go to Beijing tomorrow. 12. She isn’t a middle school student. 13. Everyone doesn’t know you well. 14. I couldn’t tell you the truth. 15. She didn’t go to school by bus. 16. Listen! Someone isn't playing the piano. 17. Don’t bring any snacks, please, 18. She didn’t buy a new bike for her son. 19. I didn’t see any boys playing in the park. 20. It wasn’t a terrible day. 21. Don’t let him run fast. 22. Don’t be polite, please. 23. I shan’t be late. 24. There weren’t two squirrels or a bird in the tree. 25. She didn’t wake up her mother this morning. 26. We needn’t wait for the green man. 27. There isn’t going to be a concert in Suzhou tomorrow. 28. You mustn’t look for a zebra crossing. 29. The shoes don’t look nice. 30. The child doesn’t eat a little sweet food at a time. 31. It isn’t sometimes rainy in the UK. 32. I didn’t keep this book for five days. 33. I didn’t do my homework last night. 学科网（北京）股份有限公司 $$