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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,

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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,
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.