语法否定句和练习（讲义）-2023-2024学年人教PEP版英语六年级下册

句型 否定句 有be有情（态动词），直接+n't/not 无be无情（态动词），找动词借助助动词don't/doesn’t/didn’t some变any 小学英语语法之否定句 be动词(受人称影响) am am not I用am; You用are; is连着he, she, it。单数、不可数用is;复数名词用are。 is isn't/is not are aren’t/ are not was wasn’t/was not were weren’t/were not 助动词（受人称影响）+动词原形 do do not/ don’t does does not/ doesn’t did did not/ didn’t 情态动词（不受人称影响）+动词原形 can can’t/ can not could couldn’t/ could not may may not might mightn’t/ might not must mustn’t/ must not禁止 have to don’t/doesn’t have to will won't would wouldn’t/ would not shall shan’t/ shall not should shouldn’t/ shouldn’t need needn’t/ need not Eg: I am a student. 句子中含有be动词am, 直接在后面加not, 因为am not 不缩写，所以句子改为： I am not a student. Eg: She is a student. 句子中含有be动词is, 直接在后面加n’t/not, 所以句子改为： She isn’t a student. 或者She is not a student. Eg: She can go shopping. 句子中含有情态动词can, 直接在后面加n’t/not, can’t直接加’t所以句子改为： She can’t go shopping. 或者She can not go shopping. Eg: I do my homework every day. 句子中无be无情, 找到动词原形do, 借助助动词don't, 助动词后面加动词原形，所以句子改为： I don't do my homework every day. Eg: My mother studies English on the weekend. 句子中无be无情, 找到动词三单studies, 借助助动词doesn't, 助动词后面加动词原形，所以句子改为： .My mother doesn’t study English on the weekend. Exercise 按要求改写句子。 1. I am ten years old.(改为否定句) I ten years old. 2. My mother is watering the flowers now.(改为否定句) 3. There is some water on the ground.(改为否定句) 4. There aren’t any sheep over there.(改为肯定句) 5. His father was a police officer two years ago.(改为否定句) 6. They can play football.(改为否定句) 7. Go at the red light.(改为否定句) 8. You should take a umbrella.(改为否定句) 9. She makes model planes ever week.(改为否定句) 10. I take a dancing class on Mondays.(改为否定句)