英语怎么转换句型（一般疑问句，否定句）讲一讲，什么助动词提前，什么be动词，最好有举例，谢谢大家了

纯手打：
1、含有be动词的句子：be动词提前，首字母大写，其他不变，句号变问号。I 、we变you，my/our变your. 肯定回答：Yes，主语+be. 否定回答：No, 主语+be+not.
例：(1) I am a student.
Are you a student? Yes, I am./ No, I'm not.
(2) This is my teacher.
Is this your teacher? Yes, he/she is./ No, he/she isn't.

2、含有实意动词的句子：
第一种：有三单形式的，三单形式还原，句子前面加Does
第二种：无三单形式的，直接在句子前面加Do
do 开头的do回答，does开头的does回答。
例：（1） I have a sister.
Do you have a sister? Yes, I do./ No, I don't.
(2) She has a sister.
Does she have a sister? Yes, she does./ No. she doesn't.

3、含有情态动词的句子：情态动词提前
例： I can speak English.
Can you speak English? Yes, I can ./ No, I can't.