7．Is his English book on the desk？．（否定回答）
No，it isn't．

分析 他的英語(yǔ)書在桌子上嗎？
-不，沒在．

解答 答案：it isn't．這道題是作否定回答，他的英語(yǔ)書為單數(shù)可數(shù)名詞，作回答時(shí)用it代替．其后be動(dòng)詞用is，否定為isn't．

點(diǎn)評(píng) 單數(shù)可數(shù)名詞/不可數(shù)名詞，回答時(shí)用it代替．復(fù)數(shù)名詞用they代替．

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