陈述句变否定句。
一、含be动词和情态动词的：
1.找be动词（am is are was were）和情态动词(can, may, must...并在后面加not，其它照写。some 变any， and变or等。
例如：陈述句： they are in the park. he can play the guitar..
否定句： they are not in the park. he can not play the guitar.
或： they aren’t in the park. he can’t play the guitar.
am not 不能缩写 is not=isn’t are not=aren’t can not=can’t
把下列句子变成否定句。
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.
is my sister.
are sweeping the floor.
二、不含be动词的：
借助动词don’t/doesn’t/didn’t,第三人称单数用doesn’t,其余人称用don’t，过去式用didn’t，然后放到人称后面，动词前面，其他照写。特别记住：前面用doesn’t/didn’t, 后面的动词一定还原成原形。
some变成any. （注：我i 、我们we 是第一人称；你you，你们you是第二人称；剩下的全部是第三人称）
例如：陈述句： i like the ducks. he likes the dogs.
否定句：i don’t like the ducks. he doesn’tlike the dogs.
把下列句子改为否定句。
1. we need some masks
2. they like ****** the puppet
3. su hai and su yang live in a new house.
put a book on my head
play basketball on sundays
6. tom likes listening to music
陈述句变一般疑问句。
一、含有be动词和情态动词的：
把be动词（am is are）和情态动词(can, may, must...放到句首，其它照写。遇i/we-you, my-your.
some-any. 句号变成问号（？）
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.
is my sister.
are sweeping the floor.
二、不含be动词和情态动词的：
借助助动词do/does/did, 过去式用did,第三人称单数用does,其余人称用do，放到句首，其他照写。特别记住：前面用does/did的，后面的动词一定还原成原形。
遇i/we-you, my-your, some-any. 句号变成问号（？）
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 ****** the puppet.
3. su hai and su yang live in a new house.
put a book on my head.
5. they sing in the classroom together.
play basketball on sundays.
7. tom likes listening to music
就画线部分提问。
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。
2、接着找be动词或情态动词can，shall， will等放在疑问词后面，若没有则请借助于助动词do/does/did帮忙，写在疑问词后面，how many除外，必须先写物品，再写be动词等。
3、划线部分去掉后剩下的内容照抄，（some 改成any，my改成your,i变you,my变your,some变any等）
4、句点改成问号。
1. that car is red. (提示：问颜色)
is that car?
2. my sister is 20 years old. (提示：问年龄)
is your sister?
3. the glasses are jim’s. (提示：问归属)
___glasses are these?
4. he is my father.(提示：问“谁”)
___is he？
5. my farther is a doctor. (提示：问职业)
___is your farther？
6. there are eleven books in my bag.(提示： 问数量)
books are there in your bag?
7. we visited our teachers on teacher’s day.(提示：问时间)
___did you visit your teachers?
is monday.(提示：问“星期几”)
is today ？
go to school by bus.(提示：问方式)
___do you go to school?
is in the library .（提示：问**）
___is jim ？
ten o’clock now.(提示：问几点钟)
is it ？
am singing. (提示：问“什么”)
___are you doing？
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