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1、 be dying for 非常渴望非常渴望 be dying to do I am dying to see you soon. I am dying for something to eat. hear from sb = receive ones letter 收到某人来信收到某人来信 hear of / hear about work out After getting up, he usually works out on the playground for an hour.单个动名词短语，不定式短语作主语单个动名词短语，不定式短语作主语 谓语动谓语动词用单数词用单数 反义疑问句主
2、语用反义疑问句主语用it To ask him for help is necessary, isnt it? Talking weight-loss pills is harmful to you, isnt it? since She has made a lot of friends since she came to our school. 自从他们结婚以来已经有三年的时间了。自从他们结婚以来已经有三年的时间了。 It is/ has been three years since they got married. need 需要 need + 名词、代词名词、代词/ 不定式不定式/
3、v-ing sth need doing/ to be done need to do sth / dont need to do sth I dont think you need to worry about that. My hair needs washing badly/ to be washed badly. need 情态动词情态动词 后加动词原形后加动词原形 多用于否定句多用于否定句和疑问句和疑问句 无时态，人称变化无时态，人称变化 You dont need to explain. You neednt explain. need have done 过去有必要做某事，但却过去有必要做某事，但却未做未做 neednt have done 过去本没有必要做某事，过去本没有必要做某事，但却做了但却做了 You neednt have waken me up; I dont have to go to work today. be worth +n. /doing 主动表被动主动表被动 be worthy of being done be worthy to be done The book is worth reading. The book is worthy of being read. the book is worthy to be read.
