Unit 4 I used to be afraid of the dark 第三课时 Section A(Grammar Focus～4c)-【黄冈金牌之路·练闯考】2022-2023学年九年级英语上册（人教版）

练闯考 英语九年级上册人教版 第三课时Section A(Grammar Focus4c) used to do sth.的用法 一、定义 used to do sth.表示“过去常常做某事”，将过去和现在进行对比，暗示现 在不这样做了。to为动词不定式符号，后接动词原形。 eg:He used to go to school at six o'clock.他过去常常六点钟去上学。 二、结构 1.used to do sth.的否定形式： ①主语+usedn't to do sth. ②主语+didn't use to do sth. eg:He used to play computer games all day..他过去常常整天玩电脑 游戏。 -He usedn't to play computer games all day. =He didn't use to play computer games all day.他过去不常整天玩电 脑游戏。 【注意】usedn't=used not 2.used to do的一般疑问句形式及其答语： ①Used+主语+todo..? ▣答：Yes,sb.used to./No,sb.usedn'tto. eg:一Used Tom to watch TV?汤姆过去常常看电视吗？ 一Yes,he used to./No,he usedn'tto.是的，他看。/不，他不看。 ②Did+主语+use to do.? ▣答：Yes,sb.did./No,sb.didn't. eg:一Did you use to do homework after school?你过去常常放学后 做家庭作业吗？ 一Yes,Idid./No,I didn't.是的，我做。/不，我不做。 3.used to do的反义疑问句形式也有两种，类似于否定句形式。 eg:-They used to see English movies on Sundays,usedn't/didn't they?他们过去常常在周日看英文电影，不是吗？ -Yes,they used to./No,they usedn't to.Yes,they did./No, they didn't.是的，他们是。/不，他们不是。 4.used to也可用于there be结构，表示“过去常有”。 eg There used to be a meeting every Monday morning last month. 上个月每个星期一上午总要开会。 三、used to do sth.,be used to doing sth.,be used to sth.和be used to do/for doing sth.的辨析 1.used to do sth.意为“过去常常做某事”。指过去的习惯性动作或状态， 与现在形成对比。 eg:I used to water flowers in the morning.我过去常常早上浇花。 2.be used to doing sth.意为“习惯于做某事”。指习惯性的状态或动作。 eg:I am used to staying here.我已经习惯了待在这里。 3.be used to sth.意为“习惯了某物”。 eg:Lily is used to rice now.莉莉现在习惯吃米饭了。 4.be used to do/for doing sth.意为“被用来做某事”。 eg:It is used to sweep/for sweeping the floor.它是用来扫地的。 语法精练 一、单项选择。 (D)1.- you_______to play the guitar? -Yes.But now I play the piano. A.Are:used B.Did:used C.Were:used D.Did:use C )2.There many kinds of birds around here,but now I seldom see them because of the cold weather. A.use to B.use to have C.used to be D.used to have D )3.-She hardly used to ride her bike to school,did she? _____She always took the bus. A.Yes,she did B.Yes,she didn't C.No,she did D.No,she didn't B )4.Oscar_in this room when he was a student,bu