没有be动词和情态动词的句子变疑问句和否定句时,要根据主语的人称和数,借助助动词do或does。例如:
1.肯定句:i
like
apples,
否定句:i
don't
like
apples.
疑问句:do
you
like
apples?
2.肯定句:he
likes
apples,
否定句:he
doesn't
like
apples.
疑问句:does
he
like
apples?
有be动词和情态动词的句子变否定句时,直接在be动词和情态动词后加not(可以缩写);变疑问句时,直接把be动词和情态动词提到句子开头(首字母大写)。
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