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+動詞的被動語態(tài) +從句 eg: It is not decided who will edit it. 5) it +動詞 be +that從句 eg: No, it couldn’t be that they were interested in him. 6) It +be + 一點時間 + when… Eg: It was Christmas Eve when I got the news of his being killed in a car crash. 7) It +be+一段時間 + since… Eg: It is/has been three week since I last heard from him. 8) It is time to do/ that… (謂語用過去時態(tài) ) Eg: It is time for us to give the house a thorough cleaning. It is time that we gave the house a thorough cleaning. 9) It + be + the first/second time that… (謂語動詞用完成時態(tài) ) Eg: It is the first time in history that two Nobel Prizes have been awarded to the same person. 10) It takes sb. Time to do… Eg: It took Mary 20 minutes to choose a suitable dress for the party. It 用于強調(diào)句 結(jié)構(gòu): It+動詞 be+強調(diào)部分 +who(whom)/that+其他部分 it可以用來對句子的某一成分加以強調(diào) 。 Eg: Nancy saw your sister in Tokyo last week. It was Nancy who saw your sister in Tokyo last week. It was your sister w