Unit 8 Section A Grammar -4c 课件2022-2023学年人教版八年级英语下册

Section A (Grammar Focus-4c) Unit 8 Have you read Treasure Island yet? Have you read Little Women 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. Grammar Focus have/has + 过去分词 定义：表示过去发生或已经完成的某一动作对现在造成的影响或结果。常与 already, yet, just 等词连用。 现在完成时（一） I’ve already finished reading it. Have you read Little Women yet? 现在完成时的构成 肯定句: 主语+have/has + v.-ed+其他 否定句: 主语+haven’t/hasn’t + v.-ed+其他 一般疑问句：Have/Has +主语+ v.-ed+ …? 肯定答语: Yes, 主格代词+ have/has. 否定答语: No, 主格代词+ haven’t/hasn’t. see-saw-seen; be-was, were-been eat-ate-eaten; break-broke-broken go-went-gone; take-took-taken send-sent-sent; find-found-found make-made-made; have-had-had v.-ed 的变化形式大部分与动词过去式形式相同，但是不规则动词的变化形式没有规律，需要记忆 Have you ever seen the film “Harry Potter”? I’ve spent 3 years in the countryside. 1.表示动作到现在为止已经完成或刚刚完成 现在完成时的用法 2.动作发生在过去，强调对现在的结果、影响等 I have finished my work. We have set up many new factories. already “已经”，常用于肯定句中。一般置于助动词have/has之后，v.-ed 之前，但也可以放在句末。 just “刚刚”，常用于肯定句中。一般置于助动词have/has之后，v.-ed 之前。 yet 在现在完成时句型中常置于句末： “已经”，常用在疑问句中, 2) “还，仍然”，常用于否定句和疑问句 与 already; just; yet 连用 1. He ____ not ______ (begin) to work ____. 2. I ____________ (finish) my homework _______. 3. We have ____ heard of her marriage. 4. I __________________ (solve) this problem. 5. ________________ (finish) your homework ____? 6. I have _____ finished lunch. yet already just begun has have finished have already solved yet Have you finished just 根据句意及所给提示填空。 现在完成时 VS 一般过去时 现在完成时表示过去发生的某一动作对现在造成的影响或结果，强调的是现在的情况，因此不能和表示过去的时间状语连用。 I have already done my homework.（不能用last night等） I've been to Paris before.（不能用last year等） 2.一般过去时只表示过去的动作和状态，与现在无关。可以和表示过去的时间状语连用。 I did my homework last night. When did you go to Paris? （when 一定不要和现在完成时连用） 3. 日常对话中通常两种时态配合使用，开始提到一件事做没做或发生过时