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Used ...to ...? ● 兩種附加疑問(wèn)句形式 : didn’ t ... usedn’ t ... 如 : She used to see him last year. 她去年常見(jiàn)到他。 He didn’ t use to live in this city. =He usedn’ t to live in this city. 他過(guò)去不住在這個(gè)城市里。 Did you use to play the piano? =Used you to play the piano? 你過(guò)去常彈鋼琴嗎 ? Did there use to be owls here? =Used there to be owls here? 這里原來(lái)有貓頭鷹嗎 ? There used to be some trees in this field,usedn’ t/didn’ t there?這田里原來(lái)有些樹(shù)木的 ,是嗎 ?