改成否定句和一般疑问句.I have a stomach-ache.You must help your mother at home.

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改成否定句和一般疑问句.I have a stomach-ache.You must help your mother at home.
改成否定句和一般疑问句.
I have a stomach-ache.You must help your mother at home.

改成否定句和一般疑问句.I have a stomach-ache.You must help your mother at home.
i don ‘t have a stomach ache
do you have a stomach ache
you needn't help your mother at home
do you need to help your mother at home

I have a stomach-ache。否定句 I don not have a stomach-ache。 一般疑问句Have you had a stomach-ache?
You must help your mother at home.否定句You need not help your mother at home。一般疑问句Need I help my mother at home?
这俩都是特殊的,需要额外记忆。望采纳。

否定句
I don't have a stomach-ache.
You needn't help your mother at home.
一般疑问句。
Do you have a stomach-ache?
Must I help my mother at home?

第一句,否定,I don't have a stomach-ache.
一般疑问,Do you have a stomach- ache?
第二句,否定,You mustn't help your mother at home,
一般疑问,Must you help your mother at home?你非得帮你妈妈在家吗?
或者是Should you help...

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第一句,否定,I don't have a stomach-ache.
一般疑问,Do you have a stomach- ache?
第二句,否定,You mustn't help your mother at home,
一般疑问,Must you help your mother at home?你非得帮你妈妈在家吗?
或者是Should you help your mother at home?你能帮你妈妈在家吗?
两个完全不同的意思。第一句带责备,第二句询问

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I don't have a stomach-ache.
Do you have a stomach-ache?

You needn't help your mother at home.
Do you need to help your mother at home?

I have a stomach-ache
否定句:I don't have a stomach-ache.
疑问句:Do you have a stomach-ache?
You must help your mother at home.
否定句:You mustn't help your mother at home.
疑问句:Must/Need I help my mother at home?