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最佳答案：You must stay here.Must I stay here?Yes,you must.No,you needn't.
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最佳答案：I'm a student You are a teacher Tom is a good boy 否定句 I'm not a student You are
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最佳答案：We must study hardmust you study hard?yes,you must/no,you needn't
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最佳答案：My friends run fastMy friends don't run fastdo you friends run fast?noMy friends
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最佳答案：肯定句:His name is Mike.否定句:His name isn't Mike.一般疑问句:Is his name Mike?肯定回答:Yes,it
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最佳答案：Tom has two big ears.Tom doesn't have two big ears.Does Tom have two big ears?
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最佳答案：May I……?No,you can't.Must I……?No,you needn't.
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最佳答案：一、系表结构1）肯定句：I'm 16 years old.否定句：I'm not 16 years old.一般疑问句：Are you 16 years old
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最佳答案：I must do my homework.I have to clean my room.I must not disturb the lesson.I do