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最佳答案:1)if有两个用法,1、引导状语从句:主将从现.如果.if he goes ,i will go2、引导宾语从句.是否=whether.he does not
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最佳答案:1.Jack eats too much food for breakfast.【划线部分为too much food否:Jack doesn't eat to
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最佳答案:Is this your wallet?Yes,it is.No,it isn't.
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最佳答案:Jim has short hair(改为一般疑问句及否定回答)Does Jim have short hair?No,he doesn't.My friend
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最佳答案:Did your grandmother buy you a present the day before yesterday?Yes,she did.No,s
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最佳答案:一般现在时L'm a student. l'm not a student Are you a student?一般将来时l'll be a student.