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简介：
1.There is + 可数名词的单数（a / an / one...)
肯定句：There is an elephantin the zoo.
否定句：There isn't anelephant in the zoo.
一般疑问句：Is there an elephantin the zoo?
肯定回答：Yes,there is.
否定回答：No,there isn't.
2.There is + some 不可数名词
肯定句：There is some cake onthe plate.
否定句：There isn't any cakeon the plate.(注意：否定句和疑问句中some变为any)
一般疑问句：Is there any cake onthe plate?
肯定回答：Yes,there is.
否定回答：No,there isn't.
划线部分提问: What's on the plate?
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