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he used to teach history. ① 否定式: She used not to teach She didn’t use to teach history. ② 疑問式: Use she to teach history?或 Did she use to teach history? 〈用法拓展〉 ⑴be used to do sth = be used for doing sth 被用于做某事 ⑵be/bee/get used to ( doing) sth習(xí)慣于某事 . Great ch anges have taken place since 1995. 〈 知識鏈 接〉①Heat turns water into 成蒸氣。 ②Turn this sentence into English. e 8. in some way