句型变换知识点：
一、 记住五种类型的句子，（这五种类型的句子只针对句型变换知识点）
1、 含有be动词的句子，amisare, waswere
2、 含有情态动词的句子，cancould, maymight, shallshould, willwould, must, need, 等等
3、 含有完成时态的句子，havehashad 过去分词
4、 含有其它动词的句子，只要不包括上面三类的都归入这一类，单独的havehashad作动词时也归入这一类。
5、 祈使句
二、句型变换
主要涉及变否定句、变一般疑问句和变特殊疑问句。
重点记住前面四类，因为祈使句一般只涉及变否定句。
二、 变否定句
变否定句时，肯定句中some同时改为any。
1、 含有be动词的句子，amisare, waswere 在be动词后加否定词not.
You are a teacher. - You are not a teacher. - You aren’ta teacher. （能缩写的尽量缩写。）
The dog is nice to man. - The dog is not nice to man. - The dog isn’tnice to man.
I am at home now. - I am not at home now. - I’mnot at home now. （am not 不能缩写）
2、 含有情态动词的句子，cancould, maymight, shallshould, willwould, must, need, 等等
含有情态动词的句子，在情态动词后面加否定词not，能缩写的尽量缩写。
I can speak English well. - I can’tspeak English well.
The children will go to school on weekends. - The children won’tgo to school on weekends.
We need fix our car right now. - We needn’tfix our car right now.
You may come here by bus. - You may notcome here by bus. (may not 不能缩写)
3、 含有完成时态的句子，havehashad 过去分词
含有完成时态的句子，在havehashad 后面加否定词not, 能缩写要缩写。
I have finished my homework. - I haven’tfinished my homework.
Bill has been to Beijing many times. - Bill hasn’tbeen to Beijing many times.
4、 其它动词的句子，只要不包括上面三类的都归入这一类。 其它动词的句子，在主语后面、动词前面加don’t doesn’t didn’t ，这需要我们进行判断。
1） 如果动词是过去式的句子，则加didn’t, 过去式还原。
They boughta motorbike last week. - They didn’t buya motorbike last week.
We hada good rest last week. - We didn’t havea good rest last week.
2） 如果是一般现在时第三人称单数的句子，则加doesn’t, 有s的动词还原。
She getsup at six every day. - She doesn’t getup at six every day.
The little boy hassomebread for breakfast every day. - The little boy doesn’t haveany bread for breakfast every day.
3） 上面两种都不是，则用don’t 。
The boys often play basketball after school. - The boys don’toften play basketball after school.
5、 祈使句 祈使句在句首加don’t.
Run to school! - Don’trun to school.
四、变一般疑问句
变一般疑问句时，注意some 改为any, 一、二人称互换。
1、 含有be动词的句子，amisare, waswere 把be动词提前
I’m a teacher. - Are youa teacher ?
This is a sofa. - Is thisa sofa ?
They are ducks. - Are theyducks ?
2、 含有情态动词的句子，cancould, maymight, shallshould, willwould, must, need, 等等 把情态动词提前
I can have some bread and milk for breakfast. - Can youhave any bread and milk for breakfast ?
3、 含有完成时态的句子，havehashad 过去分词 把havehashad 提前
I have had some rice and meat for lunch. - Have you hadany rice and meat for lunch?
4、 其它动词的句子，只要不包括上面三类的都归入这一类。 在句首加dodoesdid 判断方法同上。
He likes to read novels. - Does he liketo read novels ?
Tom taught himself English yesterday. - Did Tom teachhimself English yesterday ?
Our teachers go to school on foot every day. - Do your teachersgo to school on foot every day ?
五、变特殊疑问句
变特殊疑问句，就是针对划线部分提问，先确定是哪种类型的句子。再变成一般疑问句，然后用特殊疑问词代替划线部分。
1、 The museum closes at 18:00. (判断出是第四种类型的句子)
- Does the museum close at 18:00? （判断用what time 特殊疑问词）
- What timedoes the museum close ? （把特殊疑问词放在句首）
2、 It is 18:00now. (判断出是第一种类型的句子)
- Is it 18:00now ? （判断用what time 特殊疑问词）
- What timeis it now ? （把特殊疑问词放在句首）
3、 There are 45students in our class. (判断出是第一种类型的句子)
- Are there 45students in your class? （判断用how many 特殊疑问词）
- How many studentsare there in your class? （把特殊疑问词 划线部分修饰的名词一起放在句首）
4、 The film has been on for 10 minutes. (判断出是第三种类型的句子)
- Has the film been on for 10 minutes? （判断用how long 特殊疑问词）
- How longhas the film been on ? （把特殊疑问词放在句首）