内容正文:
译林版英语五年级上册 Unit 2 I feel good 语法专项
(一般现在时三单否定)
第一部分:语法梳理
本单元围绕“身体感受与健康”主题展开,核心语法是一般现在时中第三人称单数主语的否定句,同时复习和巩固动词三单的肯定形式。
本单元话题为“身体不适”与“给出建议”,因此大量涉及描述“某人感觉不舒服”以及“某人不能做某事”,这正是三单否定句的主要运用场景。
一、一般现在时第三人称单数否定句的结构
当主语为第三人称单数(he / she / it / 单数人名 / 单数名词)时,否定句的结构为:
主语 + doesn't(does not)+ 动词原形 + 其他.
例句对比:
肯定句
否定句
She has a cold.
She doesn't have a cold.
He feels good.
He doesn't feel good.
Mike eats breakfast.
Mike doesn't eat breakfast.
The cat drinks milk.
The cat doesn't drink milk.
My sister watches TV.
My sister doesn't watch TV.
二、本单元高频动词三单形式变化
以下为本单元核心动词的三单形式(肯定式):
动词原形
三单形式
在本单元中的常用语境
feel
feels
He feels cold. / She feels happy.
have
has
He has a headache. / She has a fever.
eat
eats
She eats breakfast. / He eats too much.
drink
drinks
He drinks water. / The cat drinks milk.
go
goes
She goes to school. / He goes to the doctor.
take
takes
He takes some medicine.
say
says
She says hello. / He says he feels bad.
talk
talks
She talks to the teacher.
know
knows
He knows about health.
三、三单否定句的关键规则
规则一:借助助动词 doesn't,谓语动词恢复原形
- 肯定:She feels cold.
- 否定:She doesn't feel cold.(❌ 不能说 She doesn't feels cold.)
规则二:have 在否定句中变回 have,不用 has
- 肯定:He has a fever.
- 否定:He doesn't have a fever.(❌ 不能说 He doesn't has a fever.)
规则三:频度副词的位置不变(放在 doesn't 之后)
- 肯定:She often gets up late.
-否定:She doesn't often get up early.(频度副词放在doesn't之后,实义动词之前)
四、本单元重要句型与语境
1. 询问身体状况:
- What's wrong with you?(你怎么了?)
- What's the matter?(怎么了?)
2. 描述身体感受(肯定与否定):
- I feel cold. / I don't feel cold.
- She feels hot. / She doesn't feel hot.
- He has a headache. / He doesn't have a headache.
- She has a fever. / She doesn't have a fever.
3. 给出建议(should + 动词原形):
- You should go to the doctor.(你应该去看医生。)
- You should take some medicine.(你应该吃点药。)
- You shouldn't eat too much.(你不应该吃太多。)
4. 频度副词与否定:
- He sometimes doesn't feel good.(他有时感觉不舒服。)
- She never goes to the doctor.(她从不去看医生。)
五、三单否定与其他句型的对比
句型
结构
示例
肯定句
主语 + 动词三单
She feels good.
否定句
主语 + doesn't + 动词原形
She doesn't feel good.
一般疑问句
Does + 主语 + 动词原形?
Does she feel good?
肯定回答
Yes, 主语 + does.
Yes, she does.
否定回答
No, 主语 + doesn't.
No, she doesn't.
六、本单元易错点总结
易错点一:否定句中用 doesn't 后,动词忘记恢复原形。
❌ He doesn't goes to school. → ✅ He doesn't go to school.
易错点二:主语为三单时,否定句用 doesn't,不用 don't。
❌ She don't feel good. → ✅ She doesn't feel good.
易错点三:have 在否定句中变回 have。
❌ He doesn't has a headache. → ✅ He doesn't have a headache.
易错点四:频度副词位置放错。 ❌ She usually doesn't feel cold. → ✅ She doesn't usually feel cold.(频度副词放在doesn't 之后也可,但位置灵活;考试中常见放在doesn't后)
易错点五:否定句与一般疑问句混淆。 ❌ She doesn't has a fever? → ✅ Does she have a fever? / She doesn't have a fever.
第二部分:对应练习
练习一:用所给动词的适当形式填空(肯定或否定)
1. She __________ (feel) good today. She is happy.
2. He __________ (not / have) a headache. He feels fine.
3. My sister __________ (not / eat) breakfast in the morning.
4. My mother __________ (take) some medicine for her cold.
5. The little boy __________ (not / drink) milk. He likes juice.
6. Mike __________ (go) to the doctor when he is ill.
7. My father __________ (not / feel) well. He has a fever.
8. She __________ (say) hello to her friends every day.
9. The dog __________ (not / eat) vegetables. It likes meat.
10. He __________ (not / have) a fever. He just has a cold.
11. Her grandmother __________ (not / get) up late. She gets up early.
12. The baby __________ (cry) when he is hungry.
13. My brother __________ (not / talk) much in class. He is quiet.
14. He __________ (know) the answer. He is very clever.
15. She __________ (not / watch) TV after dinner. She reads books.
练习二:用 have / has / don't have / doesn't have 填空
1. I __________ a cold. I don't feel well.
2. She __________ a fever. She should go to the doctor.
3. They __________ enough sleep. They feel tired.
4. My father __________ a headache. He needs to rest.
5. He __________ any bread. He wants to eat some.
6. My mother __________ a toothache. She needs to see the dentist.
7. We __________ any water. Let's go to buy some.
8. The cat __________ four legs.
9. You __________ a good habit. Keep it up!
10. He __________ a sister. He is the only child.
练习三:单项选择
( ) 1. She ______ feel good today.
A. don't B. doesn't C. not
( ) 2. He ______ a headache. He feels bad.
A. have B. has C. doesn't have
( ) 3. My mother ______ breakfast in the morning.
A. doesn't eat B. doesn't eats C. don't eat
( ) 4. Wang Bing ______ to the doctor when he is ill.
A. go B. goes C. going
( ) 5. —What's wrong with you? —I ______ a fever.
A. have B. has C. am
( ) 6. She ______ milk. She likes juice.
A. doesn't drink B. doesn't drinks C. don't drink
( ) 7. My father ______ well. He has a cold.
A. doesn't feel B. doesn't feels C. don't feel
( ) 8. The little boy ______ vegetables. He likes meat.
A. doesn't eat B. doesn't eats C. don't eat
( ) 9. He ______ the answer. He is very smart.
A. know B. knows C. knowing
( ) 10. My sister ______ TV in the evening. She reads books.
A. doesn't watches B. doesn't watch C. don't watch
( ) 11. She ______ a fever. She feels very hot.
A. have B. has C. doesn't have
( ) 12. He ______ his mother with the housework.
A. help B. helps C. helping
( ) 13. My mother ______ a headache. She feels bad.
A. have B. has C. doesn't have
( ) 14. The baby ______ when he is hungry.
A. cry B. cries C. crying
( ) 15. He ______ much in class. He is very quiet.
A. doesn't talk B. doesn't talks C. don't talk
练习四:根据中文提示完成句子
1. 她今天感觉很好。
She __________ __________ today.
2. 他没有头痛。
He __________ __________ a headache.
3. 我妈妈早餐喝牛奶。
My mother __________ __________ for breakfast.
4. 他不吃蔬菜。
He __________ __________ vegetables.
5. 她发烧了。
She __________ a __________.
6. 我父亲今天感觉不舒服。
My father __________ __________ well today.
7. 她晚上不看电视。
She __________ __________ TV in the evening.
练习五:按要求改写句子
1. She feels good today.(改为否定句)
________________________________________________
2. He has a fever.(改为否定句)
________________________________________________
3. My mother drinks milk in the morning.(改为否定句)
________________________________________________
4. She goes to the doctor when she is ill.(改为否定句)
________________________________________________
5. The cat eats fish.(改为否定句)
________________________________________________
6. I eat breakfast at 7:00.(用He替换主语改写,并改为否定句)
________________________________________________
7. My father gets up early.(改为一般疑问句,并作肯定回答)
一般疑问句:__________________________________
肯定回答:____________________________________
练习六:用所给动词的适当形式填空(上下文综合)
Helen is a healthy girl. She __________ (have) many good habits. She __________ (get) up early every day. She __________ (brush) her teeth before breakfast. She __________ (eat) fruit and vegetables. She __________ (not / drink) too much cola. She __________ (go) to bed early. She __________ (feel) good every day.
But her brother Tim doesn't have good habits. He __________ (get) up late. He __________ (not / eat) breakfast in the morning. He __________ (watch) TV too much. He often __________ (have) a headache.
Helen __________ (not / like) her brother's habits. She __________ (say), "Tim, you should change your habits!"
练习七:找出句子中的错误并改正
1. She don't feel good today.
________ → ________
2. He doesn't has a headache.
________ → ________
3. My mother doesn't drinks milk.
________ → ________
4. The cat don't eat vegetables.
________ → ________
5. She doesn't goes to the doctor.
________ → ________
6. I doesn't feel well today.
________ → ________
7. She doesn't watches TV in the evening.
________ → ________
8. He don't have breakfast in the morning.
________ → ________
练习八:阅读理解,判断正(T)误(F)
Nancy is a lovely girl. She has many good habits. She gets up early every morning. She feels good every day. She eats fruit and vegetables every day. She doesn't eat too much meat. She drinks milk before bedtime. She doesn't watch TV in the evening. She goes to bed early.
But Nancy's brother Tim doesn't have good habits. He doesn't get up early. He doesn't eat breakfast. He eats too much meat. He doesn't drink milk. He watches TV for a long time at night. He often has a headache. He doesn't feel good.
( ) 1. Nancy gets up late.
( ) 2. Nancy eats fruit and vegetables every day.
( ) 3. Nancy doesn't watch TV in the evening.
( ) 4. Tim has good habits.
( ) 5. Tim often has a headache.
参考答案
练习一
1. feels 2. doesn't have 3. doesn't eat 4. takes 5. doesn't drink
6. goes 7. doesn't feel 8. says 9. doesn't eat 10. doesn't have
11. doesn't get 12. cries 13. doesn't talk 14. knows
15. doesn't watch
练习二
1. have 2. has 3. don't have 4. has 5. doesn't have
6. has 7. don't have 8. has 9. have 10. doesn't have
练习三
1. B 2. B 3. A 4. B 5. A 6. A 7. A 8. A 9. B 10. B
11. B 12. B 13. B 14. B 15. A
练习四
1. feels good 2. doesn't have 3. drinks milk
4. doesn't eat 5. has; fever 6. doesn't feel 7. doesn't watch
练习五
1. She doesn't feel good today.
2. He doesn't have a fever.
3. My mother doesn't drink milk in the morning.
4. She doesn't go to the doctor when she is ill.
5. The cat doesn't eat fish.
6. He doesn't eat breakfast at 7:00.
7. 一般疑问句:Does your father get up early? 肯定回答:Yes, he does.
练习六
has, gets, brushes, eats, doesn't drink, goes, feels, gets, doesn't eat, watches, has, doesn't like, says
练习七
1. don't → doesn't
2. has → have
3. drinks → drink
4. don't → doesn't
5. goes → go
6. doesn't → don't
7. watches → watch
8. don't → doesn't
练习八
1. F(她早起)
2. T
3. T
4. F(Tim习惯不好)
5. T
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