Unit4 I used to be afraid of the darkSection A1. — Mario, you used to be short, didn’t you?马里奥，你以前个子矮，对吗？ — Yes, I did. 是的。【1】 (1) use v.使用→useful adj. 有用的 use up 用完Studying English is__________(use).(2) use sth to do sth 用某物做某事We use Internet __________(find) information.(3) used to do sth 过去做某事，表示过去做过的事现在已经不做，只用过去时态。◆变成否定句或疑问句时要借助助动词didn’t/didusefulto find 【拓展】（一） 肯定形式：主语+used to+do… I used to get up at six. (二) 否定形式：主语+ usedn’t /didn’t use +to do … He usedn’t to study hard.= He didn’t use to study hard. (三）疑问形式: ① Used +主语+ to do sth …? 答语： Yes, 主语+used to./ No, 主语+ usedn’t to②Did + 主语+ use + to do ….? 答语： Yes， 主语+ did./ No, 主语+ didn’t Used he to go to school on foot?= Did he use to go to school on foot? (四) 反意疑问句：肯定句+ didn’t /usedn’t+ 主语？ He used to be very rich, didn’t he/ usedn’t he?否定句+ did /used +主语？ He didn’t use to smoke, did /used he? ①My mother used_________（tell）us story when we were young. ( ) ②He used to ____short and ____ short hair when he was young. A. have; be B. be; have C. be; be D. have; haveto tellB【用法归纳】【辨析】：used to do sth |
