江苏省常州市西夏墅中学高一英语牛津版课件 必修二：UNIT 1 TALES OF THE UNEXPLAINED GRAMMAR AND USAGE 1.ppt

1、Grammar and usageUnit1Present perfect tense Present perfect continuous tenseUnit 1 课件描述：本课件总结了现在完成时和现在完成进行时的用法，并设计了一些练习题帮助学生巩固对这两种时态的掌握。Present perfect tenseStep 1 Lead-in Go over the news story on Page 2 and find the sentences using the present perfect tense.Please explain why the tense is used in

2、these sentences.The disappearance of Justin _ (make)Kelly very unhappy.has made1.We use the present perfect tense to talk about things that happened in the recent past,but are connected to the present.Step 2 Points 1-6 I _(not see)Justin since last Friday night.have not seen2.We also use the present

3、 perfect tense to talk about something that started in the past,and is still happening now.3.We use the present perfect tense when the exact time of an action is not clear or important.We use it with time expressions such as:already ever for just lately never recently since yet Exercise:complete the

4、 following sentences with the proper tense:(1)We _(study)English for about five years.(2)They _(live)in the south since their daughter was born.(3)I _(read)your article three times.Its well written.(4)The student _(finish)her homework already.(5)Eric _ just _(go)back to his hometown.have studiedhave

5、 livedhave readhave finishedhas gone We use already for affirmative statements and yet for negative statements.We use for+a period of time and since+a point in time.4.We use the present perfect tense to talk about actions that were completed only a short time ago.The police have just finished search

6、ing the areas.5.We can also use the present perfect tense for repeated actions,that is,we use the present perfect tense with the time expressions once/twice/three times 6.Form:have/has+the past participle of the verbStep 3 Read the diary entry and then complete it using the correct forms of the verb

7、s in brackets.Answers:(2)saw (3)has visited (4)loves (5)hasnt visited (6)has swum (7)has never met (8)has dived (9)has found (10)hasnt found (11)Has,been Present perfect continuous tense1.Form:have/has been+the present participle of the verb.2.We use the present perfect continuous tense to talk abou

8、t actions that started in the past and are still continuing.I have not been sleeping well since I returned home.Past _ Presentnot being able to sleep wellI returned home.Im still not sleeping well.3.We also use the present perfect continuous tense to talk about actions that have just finished but ar

9、e still connected to the present in some way.Kelly:Sorry Im late.Have you been waiting long?Mavis:Yes.Ive been waiting for an hour.past _ One hour ago PresentMavis started waiting for Kelly.Kelly arrives.have been observinghave been talkinghave been takinghave seenhave been writing1990-present:Crop circles are so interesting1990-present:Crop circles are so interesting to study!I(4)crop circles too.have been studying1.Prepare Grammar and usage on page 10-11.2.Finish Part C1 and C2 on page 88 in Workbook.Homework