高一英语精品课件：UNIT1TALES OF THE UNEXPLAINED GRAMMAR AND USAGE 1（牛津译林版必修2）.ppt

1、Grammar and usageUnit 1Present perfect tense&Present perfect continuous tensePresent 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 these sentences.The disappearance of Justin_ (make)Kelly ve

2、ry 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 perfect tense to talk about something that started in the p

3、ast,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 following sentences with the proper tense:(1)We _(study)Eng

4、lish 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 livedhave readhave finishedhas gone We use already for affi

5、rmative 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 searching the areas.5.We can also use the present perfect tense fo

6、r repeated actions,that is,we use the present perfect tense with the time expressions once/twice/three times6.Form:have/has+the past participle of the verbStep 3 Read the diary entry and then complete it using the correct forms of the verbs in brackets.Answers:(2)saw (3)has visited (4)loves (5)hasnt

7、 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 about actions that started in the past and are still continuing.I

8、 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 are still connected to the present in some way.Kelly:Sorry Im l

9、ate.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 been watchinghave seenhave been writing1.Prepare Grammar and usage.2.Finish Part C1 and C2 in Workbook.Homework