Unit 8 Section A Grammar Focus-4c 课件 2022-2023学年人教版英语八年级下册

Unit 8 Section A Grammar Focus-4c Have you read Treasure Island yet? 1 Have you read Little Woman yet? Yes, I have. / No, I haven’t. Has Tina read Treasure Island yet? Yes, she has. She thinks it’s fantastic. Have you decided which book to write about yet? Yes, I have. I’ve already finished reading it. It was really good. 找出现在完成时的结构,并圈出动词的过去分词形式。 1 (_) read-_-_. 阅读 read read (_) decide-_-_. 决定 decided decided (_) finish-_-_. 完成 finished finished 过去式 过去分词 meaning 动词过去分词形式的变化规则 2 动词过去分词的规则变化:_ stay → _ → _ work → _ → _ taste → _ → _ like → _ → _ study → _ → _ copy → _ → _ stop → _ → _ plan → _ → _ stayed stayed worked worked tasted tasted liked liked studied studied copied copied stopped stopped 与该动词的过去式相同 一般情况下直接 + ed 以不发音e结尾的直接+ d planned planned 以辅音字母+y结尾的,把y变i 再 + ed 以重读闭音节“辅元辅”结构结尾的, 双写尾字母,再+ed 动词过去分词形式的不规则变化 3 let → _ → _ cut → _ → _ read → _ → _ feel → _ → _ keep → _ → _ sleep → _ → _ let let cut cut read read felt felt kept kept slept slept 以不变应万变. 动词中间有俩e, 去掉一个( e ),后加t 4 动词过去分词形式的不规则变化 3 lend → _ → _ build → _ → _ send → _ → _ buy → _ → _ bring → _ → _ catch → _ → _ teach → _ → _ see → _ → _ lent lent built built 动词字母d变t. 变为以-ought或-aught结尾. bought bought brought brought sent sent caught caught taught taught saw seen 5 Have you read Little Woman yet? Yes, I have. / No, I haven’t. Has Tina read Treasure Island yet? Yes, she has. She thinks it’s fantastic. Have you decided which book to write about yet? Yes, I have. I’ve already finished reading it. It was really good. 现在完成时的结构 3 1)基本结构:肯定句:主语+_/_+_+其他 否定句:主语+_/_+_+_+其他 疑问句:_/_+主语+_+其他 -Yes, 主语+_/_. ;No,主语+_/_. 2)常与标志词_一起出现 have has 过去分词 have has not 过去分词 Have Has 过去分词 have has haven’t hasn’t already, yet 6 现在完成时 一般过去时 用法 时间 状语 谓语 动词 表示过去发生的动作对现在造成的影响,侧重于现在的情况。 表示过去某个时候发生的动作或存在的状态,与现在无关。 常和already, yet, just, ever, never, before, since, for+段时间, 次数(twice, many times), so far 等连用。 常和 yesterday, last week, just now, in 2012, two days ago等具体的表示过去的时间状语连用。 与一段时间连用时,谓语动词要用延续性动词而不用非延续性动词。 谓语动词没有延续性或非延续性动词的限制。 现在完成时用