冀教初中英语八上《Lesson 16 Happy Thanksgiving!》PPT课件 (4).ppt
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1、Lesson 16,Present Perfect Tense(现在完成时):,结构:助动词 have/has + p.p.(过去分词),用法:1.表示过去发生或已经完成的某一动作对现在造 成的影响和结果。 I have finished my homework.,2.表示过去已经开始,持续到现在的动作或状态, 经常和表示从过去某一时刻延续到现在(包括 “现在”在内)的一段时间的状语连用。 She has lived in Beihai for 20 years. I have been at this school for 13 years. He has taught us since(自
2、从) last year.,She has taught us a lot.She hasnt taught us a lot.Has she taught us a lot? Yes, she has. No, she hasnt.,I have had my lunch.,I havent had my lunch.,Have you had your lunch?,Yes, I have. No, I havent.,现在完成时和一般过去时的区别:,现在完成时:强调现在的情况,不能和表示过去的时 间状语连用,如:yesterday, last night, three weeks ago
3、, in 1990等,但常和already, never, ever, just, before, yet, since 等状语 连用。,一般过去时:只表示过去的动作或状态,和现在没有任 何关系,常和表示过去的时间状语连用。,I have seen the film. 我看过这部电影。I saw the film last week. 我上星期看了这部电影。,用所给单词的适当形式填空:1. She _(teach) us for two years.2. He _(teach) us last year.3. They _(live) here in 1973.4. She _(see) th
4、e film eight days ago.5. She _(see) the film.6. Yesterday Tom _(go) to school by bike.7. Mr. Li _ (teach) us since September.,has taught,taught,lived,saw,has seen,went,_,_,_,_,_,has taught,_,原形或三单,always, usually, often, sometimes, every day ,过去式,yesterday, last night, two weeks ago, in 1990 ,be + v
5、-ing,now, Listen! , Look! ,will+动原be going to +动原,tomorrow, next week, next year,have/has+p.p.,already, never, ever, forsince , just, yet, before,时间表达法(一)1. 整点的表达: 用“数字或基数词+oclock”表示,6:00 6 oclock six oclock12:00 12 oclock twelve oclock,6:30 six thirty7:45 seven forty-five8:01 eight o one (o 读字母o音),
6、2. 非整点的表达:,时 + 分,时间表达法 (二),a) 表示“几点过几分(30分钟以内,包括30分钟)” 用“分钟数past整点数”表示。常用half 代替30 分钟(thirty),用a quarter代替15分钟(fifteen) 。 如: 9:20 twenty past nine 8:30 half past eight 10:15 a quarter past ten,b) 表示“几点差几分(超过30分)” 用“分钟数to整点数”表示。 如: 4:50 ten to five .(即5点还差10分) 7:45 a quarter to eight,1. 整点的表达:用“数字或基数
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