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；(1)You are a student. →You are not a student. →You aren’t a student.(2)This is Tom’s bag. → This is not Tom’s bag. → This isn’t Tom’s bag.2、在can，should， will等后加not。
如：cannot， should not， will not；（1）He can swim. → He can’t swim.(2) They will put these pictures on the wall near the school gate.→ They will not( won’t ) put the pictures on the wall near the school gate.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。
(1)He likes cats. → He doesn’t like cats.(2)They watched TV last night. → They didn’t watch TV last night.4、 some 改成any。
5、以动词开头的祈使句，在动词前don’t. 例如：Close your eyes,please. → Don’t close your eyes, please.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。
例如：I am in the garden. →Are you in the garden?2、把can，shall， will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：We will go and join them? → Will you go and join them?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，my改成your等）句点改成问号。
例如：（1） They often play basketball on Sundays. →Do they often play basketball on Sundays?（2）She reads English every morning. →Does she read English every morning?三、肯定句改特殊疑问句的方法——四步法1、根据划线部分确定是什么疑问词。
（如what、where、who、whose、how、how many、how old、when 等）2、接着找be动词或can，shall， will等放在疑问词后面，若没有则请助动词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。
(1) We can see some birds in the tree. (对画线部分提问) → What can you see in the tree.（2）He usually gets up at six o’clock . (对画线部分提问) → What time does he usually get up ?(请助动词does来帮忙)3、划线部分去掉后剩下的内容照抄，（some 改成any，my改成your等）4、句点改成问号。
剩下的全部是第三人称一、对下列句子中划线部分提问1.My father will take me to Beijing.______________________________________________________________ 2．My trip to Xi’an is great.______________________________________________________________ 3.Harry Potter Ⅳ will be on this afternoon.______________________________________________________________ 4.You may keep the book two weeks.______________________________________________________________ 5.I often help my grandfather on the farm.______________________________________________________________ 6.I am from Australia.______________________________________________________________ 7.My new pencil-box is about ten yuan.______________________________________________________________ 8.The name of the book is Sleeping Bueaty.______________________________________________________________ 9.He came to visit China two days ago.______________________________________________________________ 10.There are twelve students over there.______________________________________________________________ 11.These sneakers are 280 yuan.______________________________________________________________ 12.The weather there was a little hot.______________________________________________________________ 13.We are going to buy tomorrow’s air tickets.______________________________________________________________ 14.My father works in Africa.______________________________________________________________15.Mike wants to be a singer in the future.二,把下列句子变为一般疑问句:1. Mike is a student in Grade Six.______________________________________________________2. Sarah can clean the classroom.______________________________________________________3. There are some flowers in the vase.______________________________________________________4.He came to visit China two days ago(两天前).______________________________________________________5. They like making the presents（礼物）.______________________________________________________6. Jim and Kate often help their grandfather on the farm after school. ______________________________________________________7.We should take care of the young trees.______________________________________________________8. She has something to eat.______________________________________________________9.There is some fruit juice in the glass.______________________________________________________10. We will visit America next week(下一周).______________________________________________________三、将下列句子变为否定句：1.He takes some pictures every day.______________________________________________________2.It’s cheap enough.______________________________________________________3.The teacher should make the students happy every day.______________________________________________________4.Show me your library card,please.______________________________________________________5.She gave her brother some tapes about folk music.______________________________________________________6.This is the first time we come to Australia.______________________________________________________7.We’d better make a shopping list first.______________________________________________________8.There are a lot of(大量的)lovely animals there.______________________________________________________9.My mother will take me to Beijing for my holiday next Sunday. ______________________________________________________10.You can find many tall trees in the picture of the park.______________________________________________________。