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不定代词在反意疑问句中的用法

在英语反意疑问句中，不定代词的使用取决于主句的肯定或否定。如果主句为肯定句，不定代词使用否定形式；如果主句为否定句，不定代词使用肯定形式。但对于某些不定代词，如nobody和nothing，其肯定形式与否定形式相同，反意疑问句的形式与主句相同。

不定代词包括somebody, anybody, nobody, everybody, something, anything, nothing, everything等。它们在反意疑问句中的用法与肯定句和否定句不同。

如果反意疑问句的主句为肯定句，不定代词要使用否定形式。比如：

She knows somebody here, doesn't she?

Anybody can do this, can't they?

Everybody enjoyed the party, didn't they?

Something is wrong with the computer, isn't it?

Everything is going well, isn't it?

如果反意疑问句的主句为否定句，不定代词要使用肯定形式。比如：

She doesn't know anybody here, does she?

Nobody can solve this problem, can they?

They don't have anything to eat, do they?

You didn't see anything strange, did you?

There is nothing wrong with the car, is there?

需要注意的是，有些不定代词的肯定形式与否定形式相同，如nobody和nothing。在这种情况下，反意疑问句的形式与主句相同。比如：

Nobody knows the answer, do they?

Nothing happened, did it?