2016-2017学年人教版必修三 Unit 2 Healthy eating grammar 课件 (4)-302edu教育资源网

5.注意对need问句的回答: --Need I finish the work today? --Yes, ________________. No, ________________. No, ________________.

you must

you needn’t

you don’t have to

--Must we do it now? --No, you __________.

needn’t (don’t have to)

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