(完整word版)英语肯定句变否定句练习.docx
四年级英语肯定句改否定句练习题50题带答案解析
四年级英语肯定句改否定句练习题50题带答案解析1.I am a student.A.I am not a student.B.I'm not student.C.I not a student.答案解析：A。
肯定句中有be 动词am，改为否定句时在am 后加not。
2.He is a teacher.A.He is not a teacher.B.He's not teacher.C.He not a teacher.答案解析：A。
肯定句中有be 动词is，改为否定句时在is 后加not。
3.She is happy.A.She is not happy.B.She's not happy.C.She not happy.答案解析：A。
肯定句中有be 动词is，改为否定句时在is 后加not。
4.We are friends.A.We are not friends.B.We're not friends.C.We not friends.答案解析：A。
肯定句中有be 动词are，改为否定句时在are 后加not。
5.They are boys.A.They are not boys.B.They're not boys.C.They not boys.答案解析：A。
肯定句中有be 动词are，改为否定句时在are 后加not。
6.I have a book.A.I do not have a book.B.I don't have book.C.I not have a book.答案解析：A。
肯定句中有实义动词have，改为否定句时，主语是I，借助助动词do，在do 后加not，have 用原形。
7.He has a pen.A.He does not have a pen.B.He doesn't have pen.C.He not have a pen.答案解析：A。
(完整word)六年级英语肯定句改否定句
一、肯定句改否定句的方法：1、在be动词后加not 。
如：is not ，are not ，am not，was not ，were not ；2、在can，should ，will 等后加not 。
如：cannot ，should not ，will not ；3、上述都没有的，在动词前加助动词否定形式don' t/doesn ' t/didn ' t 。
4、some 改成any。
如：I am a girl. → I am not a girl.You are a student. → You are not a student.→ You aren ' t a student.This is Tom ' s bag, → This is not Tom 's bag.→ This isn 't Tom ' s bag. 答题方法是；否定词not 在be 后边。
二、肯定句改一般疑问句的方法：1、把be 动词放在句首，剩下的照抄，（some 改成any，I 改成you，my改成your ，）句点改成问号。
2、把can，shall ，will 等放到句首，剩下的照抄，（some 改成any，I 改成you，my改成your ，）句点改成问号。
3、上述都没有的，在句首请助动词Do/Does/Did 帮忙，剩下的照抄，（some 改成any，I 改成you，my 改成your ，）句点改成问号。
注意：句首的第一个字母要大写，句尾标点应为“？”。
如：I am in Class 6. → Are you in Class 6?You are from America. →Are you from America? It is an orange. → Is it an orange?答题方法是：要想提问，be 提前，句末“？”别忘了。
4、就一般疑问句回答一般疑问句有两种回答，即：肯定回答和否定回答。
三年级英语肯定句转换否定句练习题50题(答案解析)
三年级英语肯定句转换否定句练习题50题(答案解析)1.I am a student.A.I am not a student.答案解析：本题中，肯定句“I am a student.”变为否定句时，在be 动词am 后加not，变为“I am not a student.”。
2.He is a teacher.A.He is not a teacher.答案解析：肯定句“He is a teacher.”变否定句，在be 动词is 后加not，即“He is not a teacher.”。
3.She is a doctor.A.She is not a doctor.答案解析：“She is a doctor.”变为否定句，在is 后加not，为“She is not a doctor.”。
4.It is a cat.A.It is not a cat.答案解析：肯定句“It is a cat.”变否定句，在is 后加not，变成“It is not a cat.”。
5.We are friends.A.We are not friends.答案解析：“We are friends.”变否定句，在be 动词are 后加not，即“We are not friends.”。
6.They are students.A.They are not students.答案解析：肯定句“They are students.”变否定句，在are 后加not，变为“They are not students.”。
7.This is a book.A.This is not a book.答案解析：“This is a book.”变否定句，在is 后加not，为“This is not a book.”。
8.That is a pen.A.That is not a pen.答案解析：肯定句“That is a pen.”变否定句，在is 后加not，变成“That is not a pen.”。
三年级英语肯定句转换否定句练习题30题(带答案)
三年级英语肯定句转换否定句练习题30题(带答案)1. He is a good boy.A. He no is a good boyB. He isn't a good boyC. He is not good boyD. He don't is a good boy答案：B。
解析：在将含有be动词is的肯定句转换为否定句时，直接在is后面加not，is not可以缩写为isn't。
2. My cat is very cute.A. My cat no is very cuteB. My cat not is very cuteC. My cat isn't very cuteD. My cat don't is very cute答案：C。
解析：对于含有be动词is的肯定句，变为否定句就是在is后加not，is not可缩写为isn't。
3. She is my sister.A. She no is my sisterB. She not is my sisterC. She isn't my sisterD. She don't is my sister答案：C。
解析：把含有be动词is的肯定句变成否定句，就在is 后面加上not，is not可缩写为isn't。
4. The dog is under the tree.A. The dog no is under the treeB. The dog not is under the treeC. The dog isn't under the treeD. The dog don't is under the tree答案：C。
解析：当肯定句中有be动词is时，转换为否定句就在is后加not，is not可缩写为isn't。
5. This is a red pen.A. This no is a red penB. This not is a red penC. This isn't a red penD. This don't is a red pen答案：C。
(完整版)小学英语一般疑问句、否定句和特殊疑问(附习题)(可编辑修改word版)
一、肯定句改否定句的方法——一步法1、在be 动词后加not。
如：is not ，are not ，am not，was not，were not；2、在can，等后加not。
如：cannot3、上述都没有的，在动词前加助动词否定形式do not, does not. (don’t/doesn’t)4、some 改成any。
二、肯定句改一般疑问句的方法——三步法1、把be 动词放在句首，剩下的照抄，（some 改成any，my 改成your 等）句点改成问号。
2、把can，等放到句首，剩下的照抄，（some 改成any，my 改成your 等）句点改成问号。
例如：陈述句: They are in the park. He can play the guitar..一般疑问句: Are they in the park? Can he play the guitar?把下列句子变成一般疑问句1. I am listening to music.2. Mike is a student.3. Sarah can clean the classroom.4. They are in the zoo.5. There are some flowers in the vase.6.This is my sister.7.We are sweeping the floor.3、上述都没有的，在句首请助动词Do/Does 帮忙，剩下的照抄，（some 改成any，my 改成your 等）句点改成问号。
例如：陈述句: I like the ducks. He likes the dogs.一般疑问句: Do you like the ducks? Does he like the dogs?把下列句子改为一般疑问句。
1.We need some masks.2.They like making the puppet.3.Su Hai and Su Yang live in a new house.4.I put a book on my head.5.They sing “In the classroom” together.6.We play basketball on Sundays.7.Tom likes listening to music三、肯定句改特殊疑问句的方法——四步法1、在一般疑问句的基础上，句首添加一个疑问词即可，可根据划线部分确定是什么疑问词。
四年级英语肯定句改否定句练习题50题(答案解析)
四年级英语肯定句改否定句练习题50题(答案解析)1. My mother is a teacher.A. My mother not is a teacherB. My mother is not a teacherC. My mother no is a teacher答案解析：B。
在一般现在时中，含有be动词（is）的肯定句改为否定句，直接在be动词后面加not即可。
A选项中not的位置错误，C选项no不能这样使用。
2. I like apples.A. I no like applesB. I don't like applesC. I not like apples答案解析：B。
在一般现在时中，含有实义动词（like）的第一人称 I）的肯定句改为否定句，要借助助动词do，再加not，这里do not可以缩写为don't。
A选项no用法错误，C选项缺少助动词。
3. You are my friend.A. You are not my friendB. You no are my friendC. You not are my friend答案解析：A。
对于含有be动词（are）的第二人称（You）的肯定句改为否定句，在be动词后加not。
B选项no用法错误，C选项not的位置错误。
A. My father don't likes dogsB. My father does not like dogsC. My father not likes dogs答案解析：B。
在一般现在时中，含有实义动词 likes）的第三人称（My father）的肯定句改为否定句，要借助助动词does，再加not，同时原句中的动词要还原为原形like。
A选项助动词形式错误，C选项缺少助动词。
5. I am a student.A. I am not a studentB. I no am a studentC. I not am a student答案解析：A。
三年级英语肯定句转换否定句练习题30题含答案解析
三年级英语肯定句转换否定句练习题30题含答案解析1.I am a student.A.I am not a student.B.I'm not student.C.I am no a student.答案解析：A。
在肯定句变否定句时，有be 动词的情况下，在be 动词后加not。
am not 可以缩写为aren't。
2.She is a teacher.A.She is not a teacher.B.She isn't teacher.C.She is no a teacher.答案解析：A。
有be 动词is 的肯定句变否定句，在is 后加not。
3.It is a book.A.It is not a book.B.It isn't book.C.It is no a book.答案解析：A。
有be 动词is 的肯定句变否定句，在is 后加not。
4.This is a pen.A.This is not a pen.B.This isn't pen.C.This is no a pen.答案解析：A。
有be 动词is 的肯定句变否定句，在is 后加not。
5.That is an apple.A.That is not an apple.B.That isn't apple.C.That is no an apple.答案解析：A。
有be 动词is 的肯定句变否定句，在is 后加not。
6.We are friends.A.We are not friends.B.We aren't friends.C.We are no friends.答案解析：A。
有be 动词are 的肯定句变否定句，在are 后加not。
are not 可以缩写为aren't。
7.They are students.A.They are not students.B.They aren't students.C.They are no students.答案解析：A。
肯定句改否定句英语练习题
肯定句改否定句英语练习题一、单句改写1. She is happy. -> She is not happy.2. They have finished their homework. -> They have not finished their homework.3. He can swim very well. -> He cannot swim very well.4. The students are studying in the library. -> The students are not studying in the library.5. My friend has a car. -> My friend does not have a car.6. We will go to the party tomorrow. -> We will not go to the party tomorrow.7. The weather is nice today. -> The weather is not nice today.8. I like chocolate. -> I do not like chocolate.9. He usually arrives early. -> He usually does not arrive early.10. They have been to China before. -> They have not been to China before.二、句子改写1. Mary can play the piano. -> Mary cannot play the piano.2. The cat is sleeping on the chair. -> The cat is not sleeping on the chair.3. We should go to the meeting. -> We should not go to the meeting.4. She will buy a new dress for the party. -> She will not buy a new dress for the party.5. They have already watched the movie. -> They have not watched the movie yet.6. He is wearing a red shirt today. -> He is not wearing a red shirt today.7. We often eat lunch together. -> We do not often eat lunch together.8. The dog likes to chase squirrels. -> The dog does not like to chase squirrels.9. She can speak three languages fluently. -> She cannot speak three languages fluently.10. They go to the gym every Monday. -> They do not go to the gym every Monday.三、短文改写Yesterday, I had a delicious dinner with my family at a fancy restaurant. The food was amazing and the service was excellent. After dinner, we went for a walk in the park and enjoyed the beautiful evening breeze. It was a perfect day.改写后的短文：Yesterday, I did not have a delicious dinner with my family at a fancy restaurant. The food was not amazing and the service was not excellent. After dinner, we did not go for a walk in the park and did not enjoy the beautiful evening breeze. It was not a perfect day.四、对话改写A: Can you help me with my math homework? B: Yes, I can help you.改写后的对话：A: Can you help me with my math homework? B: No, I cannot help you.。
(完整word版)英语肯定句改为否定句、陈述句改为一般疑问句的方法和技巧
英语肯定句改为否定句、陈述句改为一般疑问句的方法和诀窍㈠肯定句变为否定句的方法——⑴加；⑵变⑴“加”——是指加not。
加not的规则是：原句中有“情助be”时则直接在“情助be”后加not（not可与“情助be”缩写）；原句中没有“情助be”时则需要另加助动词do/does/did, 然后在助动词do/does/did后加not（not可与助动词do/does/did缩写）。
助动词do和does用于一般现在时，did用于一般过去时。
⑵“变”——是指变化某些需要变化的词（因为某些词只能用于肯定句或只能用用于否定句）。
如：some→any（someone→anyone，something→anything，somewhere→anywhere）；and→or；too/also→either[´aiðə; ´i: ðə]；a lot of→many/much等。
另外，使用助动词does/did帮助否定时，原来的谓语动词要恢复原形。
例：1）He can swim. →He can’t swim.2）He will（将，要）swim. →He won’t(will not) swim.3）He is a good swimmer. →He isn’t a good swimmer.4）I have some English books. →I don’t have any English books.5）She can sing and dance. →She can’t sing or dance.6）Li Lei’s father has a lot of money. →Li Lei’s father doesn’t have much money.7）He went to Shanghai last week. →He didn’t go to Shanghai last week.说明：大多数英语肯定句改为否定句都符合上述规则，但也有一些特殊的情况不符合上述规则，在以后的学习中会学到，要注意积累。
(完整版)小学英语肯定句变否定句和一般疑问句类型(含答案)
肯定句改否定句和一般疑问句一、实义动词He often goes to bed at ten.We do eye exercises every day.She came to Japan in 1990.二、系动词I am your friend.Her mother is a teacher.There are two books on the desk. Yesterday was July 1, 1995.They were in Beijing in 1990.三、进行时The girl is standing at the station.The students are playing basketball on the playground..I am looking for a dog.四、情态动词Lucy will be back in four days.You can use this dictionary. You need go tomorrow.You should study hard..将下列陈述句变为否定句和一般疑问句。
1.He found his pen under his desk.2.We must go to the meeting right now.3.I wrote him a letter last week.4.My sister sings beautifully.5.Mary missed the bus.6.This bus will take you right to the city.7.They are doing questions and answers with theteachers.8.My father has his lunch at 11:30 everyday.9.There is a policeman at the corner of the road..10.Wang made some model ships for the boys.11.I saw somebody in the room just now.12.There is some wonderful news in today’s paper.13.Xiao Li dropped the letter into the letter box.14.They are playing on the playground.15.Tom often tells them stories in French.16.After class some students play balls.17.Mary is reading newspaper now.18.I telephoned you yesterday.19.You have to go now.20.I have a house in the country.21.We did our homework together.22.They study for examination.23.We are talking about the film.24.I can go to the zoo today. 25.The first class begins at eight o’clock.26.It takes you three hours to go to Paris by air.27.I reviewed my lessons yesterday.28.I’ll go home by bus.29.He forgot to post the letter this morning.30.This room is going to be painted next week.肯定句变否定句和一般疑问句类型答案一、实义动词He often goes to bed at ten.→He does not often go to bed at ten.→Does he often go to bed at ten?We do eye exercises every day.→We don’t do eye exercises every day.→Do you do eye exercises every day?She came to Japan in 1990.→She did not come to Japan in 1990.→Did she come to Japan in 1990?二、系动词I am your friend.→I am not your friend.→Are you my friend?Her mother is a teacher.→Her mother is not a teacher→Is her mother a teacher?There are two books on the desk.→There are not two books on the desk→Are there two books on the desk?Yesterday was July 1, 1995.→Yesterday was not July 1, 1995.→Was yesterday July 1, 1995?They were in Beijing in 1990.→They were not in Beijing in 1990→Were they in Beijing in 1990?三、进行时The girl is standing at the station.→The girl is not standing at the station.→Is the girl standing at the station?The students are playing basketball on the playground.→The students are not playing basketball on the playground.→Are the students playing basketball on the playground?I am looking for a dog.→I am not looking for a dog.→Are you looking for a dog?He was writing letters at this time last night.→He was not writing letters at this time last night.→Was he writing letters at this time last night? We were having a meeting this time yesterday.→We were not having a meeting this time yesterday.→Were you having a meeting this time yesterday?四、情态动词Lucy will be back in four days.→Lucy will not be back in four days.→Will Lucy be back in four days?You can use this dictionary.→You can not use this dictionary.→Can I use this dictionary?You need go tomorrow.→You need not go tomorrow.→Need I go tomorrow?You should study hard.→You should not study hard..→should I study hard?将下列陈述句变为否定句和一般疑问句。
(完整word版)英语肯定句变否定句练习
专题 : 把一定句改成否认句把一定句改成否认句分以下状况：1、句中有 be 动词的，在 be 动词后加 not；2、句中有神态动词的（ can ,should，must ，would ），在神态动词后边加 not；3、句中没有 be 动词和神态动词的，在动词前加don’t或 doesn’；t①句中动词为原形的，加don’t如.： I like apples.I do n’liket apples.②句中动词为三单式的，加doesn’t，并将三单式的动词复原成原形。
如： He likes apples.He doesn’t like apples.③时态为过去时的 ,要加 didn ’t 并且动词过去式要改为原形,例 :I went to school yesterday →.I didn ’got to school yesterday .4.一定句中的 some在否认句中应改为 any如： There are some students in the classroom. There are not any students in the classroom.将以下各句改成否认句1、Tom’s brother is walking in the park.______________________________________________________ 2、There are some books in the bookcase.______________________________________________________3、The students of Class 5 are cleaning the classroom.______________________________________________________ 4、I ’m a student.5、Stop and wait at a red light._________________________________________________ 6、Your father can ride a bike.______________________________________________________ 7、They can play football after school.______________________________________________________ 8、We come from China.______________________________________________________ 9、 Touch the door.______________________________________________________将以下否认句变一定句1、Don’t goat a red light.2、Don’t run on the ferry._______________________________________________ 3、I don’t go to school.4、 The ferry doesn’t work. _______________________________________________ 5、Don’t turn left on the road.______________________________________________________。
四年级英语肯定句改否定句练习题50题(带答案)
四年级英语肯定句改否定句练习题50题(带答案)1. My mother has a red car.A. My mother has not a red carB. My mother doesn't have a red car答案解析：B。
在将肯定句改为否定句时，如果句子中有实义动词（这里是has表示“有”），在一般现在时中，主语是第三人称单数时，要借助助动词doesn't，然后动词还原为原形。
这里原句是“My mother has a red car”，改为否定句就是借助doesn't，has变为have，所以是“My mother doesn't have a red car”，A选项表达错误。
2. Tom likes playing football in the park.A. Tom not likes playing football in the parkB. Tom doesn't like playing football in the park答案解析：B。
对于一般现在时含有实义动词（（这里是likes）的肯定句改为否定句，当主语是第三人称单数（（Tom）时，要加助动词doesn't，然后动词还原为原形。
原句“Tom likes playing football in the park”，改为否定句就是“Tom doesn't like playing football in the park”，A选项语法错误。
3. There are some flowers in the garden.A. There are not some flowers in the gardenB. There aren't any flowers in the garden答案解析：B。
在there be句型的肯定句改为否定句时，直接在be动词（（这里是are）后面加not，同时要注意some在否定句中要变为any。
四年级英语肯定句改否定句练习题50题答案解析
四年级英语肯定句改否定句练习题50题答案解析1.I am a student.I am not a student.答案解析：本题中“I am”表示“我是”，其否定形式是“I am not”。
原句意思是“我是一名学生”，否定句意思是“我不是一名学生”。
2.She is beautiful.She is not beautiful.答案解析：“She is”表示“她是”，否定形式为“She is not”。
原句意为“她很漂亮”，否定句意为“她不漂亮”。
3.We are friends.We are not friends.答案解析：“We are”意为“我们是”，否定形式是“We are not”。
原句意思是“我们是朋友”，否定句意思是“我们不是朋友”。
4.He is tall.He is not tall.答案解析：“He is”表示“他是”，否定形式为“He is not”。
原句意为“他很高”，否定句意为“他不高”。
5.It is a book.It is not a book.答案解析：“It is”表示“它是”，否定形式是“It is not”。
原句意思是“它是一本书”，否定句意思是“它不是一本书”。
6.They are happy.They are not happy.答案解析：“They are”意为“他们是”，否定形式是“They are not”。
原句意思是“他们很开心”，否定句意思是“他们不开心”。
7.I am hungry.I am not hungry.答案解析：“I am”表示“我是”，否定形式为“I am not”。
原句意为“我饿了”，否定句意为“我不饿”。
8.She is kind.She is not kind.答案解析：“She is”表示“她是”，否定形式为“She is not”。
原句意为“她很善良”，否定句意为“她不善良”。
9.We are busy.We are not busy.答案解析：“We are”意为“我们是”，否定形式是“We are not”。
(word完整版)小学英语肯定句变否定句和一般疑问句类型(含答案).,推荐文档
肯定句改否定句和一般疑问句一、实义动词He often goes to bed at ten.We do eye exercises every day.She came to Japan in 1990.二、系动词I am your friend.Her mother is a teacher.There are two books on the desk. Yesterday was July 1, 1995. They were in Beijing in 1990.三、进行时The girl is standing at the station.The students are playing basketball on the playground..I am looking for a dog.四、情态动词Lucy will be back in four days.You can use this dictionary. You need go tomorrow.You should study hard..将下列陈述句变为否定句和一般疑问句。
1.He found his pen under his desk.2.We must go to the meeting right now.3.I wrote him a letter last week.4.My sister sings beautifully.5.Mary missed the bus.6.This bus will take you right to the city.7.They are doing questions and answers with the teachers.8.My father has his lunch at 11:30 everyday.9.There is a policeman at the corner of the road..10.Wang made some model ships for the boys.11.I saw somebody in the room just now.12.There is some wonderful news in today’s paper.13.Xiao Li dropped the letter into the letter box.14.They are playing on the playground.15.Tom often tells them stories in French.16.After class some students play balls.17.Mary is reading newspaper now.18.I telephoned you yesterday.19.You have to go now.20.I have a house in the country.21.We did our homework together.22.They study for examination.23.We are talking about the film.24.I can go to the zoo today. 25.The first class begins at eight o’clock.26.It takes you three hours to go to Paris by air.27.I reviewed my lessons yesterday.28.I’ll go home by bus.29.He forgot to post the letter this morning.30.This room is going to be painted next week.肯定句变否定句和一般疑问句类型答案一、实义动词He often goes to bed at ten.→He does not often go to bed at ten.→Does he often go to bed at t en?We do eye exercises every day.→We don’t do eye exercises every day.→Do you do eye exercises every day? She came to Japan in 1990.→She did not come to Japan in 1990.→Did she come to Japan in 1990?二、系动词I am your friend.→I am not your friend.→Are you my friend?Her mother is a teacher.→Her mother is not a teacher→Is her mother a teacher?There are two books on the desk.→There are not two books on the desk →Are there two books on the desk? Yesterday was July 1, 1995.→Yesterday was not July 1, 1995.→Was yesterday July 1, 1995?They were in Beijing in 1990.→They were not in Beijing in 1990→Were they in Beijing in 1990?三、进行时The girl is standing at the station.→The girl is not standing at the station.→Is the girl standing at the station?The students are playing basketball on the playground.→The students are not playing basketball on the playground.→Are the students playing basketball on the playground?I am looking for a dog.→I am not looking for a dog.→Are you looking for a dog?He was writing letters at this time last night.→He was not writing letters at this time last night.→Was he writing letters at this time last night? We were having a meeting this time yesterday.→We were not having a meeting this time yesterday.→Were you having a meeting this time yesterday?四、情态动词Lucy will be back in four days.→Lucy will not be back in four days.→Will Lucy be back in four days?You can use this dictionary.→You can not use this dictionary.→Can I use this dictionary?You need go tomorrow.→You need not go tomorrow.→Need I go tomorrow?You should study hard.→You should not study hard..→should I study hard?将下列陈述句变为否定句和一般疑问句。
四年级英语肯定句改否定句练习题50题含答案解析
四年级英语肯定句改否定句练习题50题含答案解析1. I am happy.改否定句：I am not happy.答案解析：在肯定句变否定句时，在be 动词后加not。
本题中在am 后加not 变为否定句。
2. She is a student.改否定句：She is not a student.答案解析：在肯定句变否定句时，在be 动词后加not。
本题中在is 后加not 变为否定句。
3. He is tall.改否定句：He is not tall.答案解析：在肯定句变否定句时，在be 动词后加not。
本题中在is 后加not 变为否定句。
4. We are friends.改否定句：We are not friends.答案解析：在肯定句变否定句时，在be 动词后加not。
本题中在are 后加not 变为否定句。
5. They are good.改否定句：They are not good.答案解析：在肯定句变否定句时，在be 动词后加not。
本题中在are 后加not 变为否定句。
6. I am a boy.改否定句：I am not a boy.答案解析：在肯定句变否定句时，在be 动词后加not。
本题中在am 后加not 变为否定句。
7. She is beautiful.改否定句：She is not beautiful.答案解析：在肯定句变否定句时，在be 动词后加not。
本题中在is 后加not 变为否定句。
8. He is strong.改否定句：He is not strong.答案解析：在肯定句变否定句时，在be 动词后加not。
本题中在is 后加not 变为否定句。
9. We are happy.改否定句：We are not happy.答案解析：在肯定句变否定句时，在be 动词后加not。
本题中在are 后加not 变为否定句。
10. They are students.改否定句：They are not students.答案解析：在肯定句变否定句时，在be 动词后加not。
四年级英语肯定句改否定句练习题50题(答案解析)
四年级英语肯定句改否定句练习题50题(答案解析)1.I am a student.I am not a student.答案解析：此句中有be 动词am，在am 后直接加not 变为否定句。
2.She is a teacher.She is not a teacher.答案解析：此句中有be 动词is，在is 后直接加not 变为否定句。
3.He is a boy.He is not a boy.答案解析：此句中有be 动词is，在is 后直接加not 变为否定句。
4.We are friends.We are not friends.答案解析：此句中有be 动词are，在are 后直接加not 变为否定句。
5.They are students.They are not students.答案解析：此句中有be 动词are，在are 后直接加not 变为否定句。
6.I have a book.I do not have a book.答案解析：此句中有实义动词have，变为否定句时需借助助动词do，在do 后加not，have 用原形。
7.She has a pen.She does not have a pen.答案解析：此句中有实义动词has，变为否定句时需借助助动词does，在does 后加not，has 变为have。
8.He likes apples.He does not like apples.答案解析：此句中有实义动词likes，变为否定句时需借助助动词does，在does 后加not，likes 变为like。
9.We play football.We do not play football.答案解析：此句中有实义动词play，变为否定句时需借助助动词do，在do 后加not，play 用原形。
10.They sing songs.They do not sing songs.答案解析：此句中有实义动词sing，变为否定句时需借助助动词do，在do 后加not，sing 用原形。
三年级英语肯定句转换否定句练习题50题带答案
三年级英语肯定句转换否定句练习题50题带答案1. He is my father.答案：He isn't my father. 解析：这题涉及be动词的否定形式，在be动词is 后面直接加not，缩写为isn't。
2. It is a cat.答案：It isn't a cat. 解析：be动词is的否定形式是在is后加not，这里缩写成isn't。
3. I am a student.答案：I'm not a student. 解析：am的否定形式是am not，这里I'm是I am 的缩写形式。
4. She has a book.答案：She doesn't have a book. 解析：原句是一般现在时，主语是第三人称单数，在has前面加doesn't，然后把has变回原形have。
5. They like apples.答案：They don't like apples. 解析：一般现在时中，主语是复数，在动词like 前面加don't构成否定句。
6. My mother cooks dinner.答案：My mother doesn't cook dinner. 解析：主语是第三人称单数的一般现在时，在动词cooks前面加doesn't，然后动词变为原形cook。
7. There is a dog in the yard.答案：There isn't a dog in the yard. 解析：be动词is的否定形式是在is后加not，缩写为isn't。
8. He plays football.答案：He doesn't play football. 解析：主语是第三人称单数的一般现在时，在plays前面加doesn't，然后动词变为原形play。
9. The cat sleeps on the chair.答案：The cat doesn't sleep on the chair. 解析：主语是第三人称单数的一般现在时，在sleeps前面加doesn't，然后动词变为原形sleep。
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专题 : 把肯定句改成否定句
把肯定句改成否定句分以下情况：
1、句中有 be 动词的，在 be 动词后加 not；
2、句中有情态动词的（ can ,should，must ，would ），在情态动词
后面加 not；
3、句中没有 be 动词和情态动词的，在动词前加don’t或 doesn’；t
①句中动词为原形的，加don’t如.： I like apples.I do n’liket apples.
②句中动词为三单式的，加doesn’t，并将三单式的动词还原成
原形。
如： He likes apples.He doesn’t like apples.
③时态为过去时的 ,要加 didn ’t 而且动词过去式要改为原形,
例 :I went to school yesterday →.I didn ’got to school yesterday .
4.肯定句中的 some在否定句中应改为 any
如： There are some students in the classroom. There are not any students in the classroom.
将下列各句改成否定句
1、Tom’s brother is walking in the park.
______________________________________________________ 2、There are some books in the bookcase.
______________________________________________________
3、The students of Class 5 are cleaning the classroom.
______________________________________________________ 4、I ’m a student.5、Stop and wait at a red light.
_________________________________________________ 6、Your father can ride a bike.
______________________________________________________ 7、They can play football after school.
______________________________________________________ 8、We come from China.
______________________________________________________ 9、 Touch the door.
______________________________________________________
将下列否定句变肯定句
1、Don’t goat a red light.
2、Don’t run on the ferry.
_______________________________________________ 3、I don’t go to school.4、 The ferry doesn’t work. _______________________________________________ 5、Don’t turn left on the road.
______________________________________________________。