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最佳答案：Does he have to leave early?why does he have to leave early?he did not have to l
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最佳答案：I was happy.I wasn't happyWas I happy?You were a student last year.You weren't a
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最佳答案：He comes from Germany.提问:Does he come from Germany?No,he does not come from Germ
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最佳答案：1.did the sun set at twenty past seven?the sun didn't set at twenty past seven.2
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最佳答案：He can come now .Can he come now?When can he come ?He can't come now.There is a
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最佳答案：Yes,I do．
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最佳答案：疑问句：Are you a student?肯定回答：Yes,i am .否定回答：No,i am not.肯定句：I want to fly.否定句：I do
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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.