江蘇省常州市西夏墅中學高中英語 Unit1 Tales of the unexplained Grammar and usage 1課件 牛津譯林版必修

1、grammar and usagepresent perfect tense present perfect continuous tense課件描述：課件描述： 本課件總結了現(xiàn)在完成時和現(xiàn)本課件總結了現(xiàn)在完成時和現(xiàn)在完成進行時的用法，并設計了一在完成進行時的用法，并設計了一些練習題幫助學生鞏固對這兩些練習題幫助學生鞏固對這兩種時種時態(tài)的掌握態(tài)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

2、. please explain why the tense is used in 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 fr

3、iday night. have not seen2. we also use the present 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 jus

4、t lately never recently since yet exercise: complete the 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 homew

5、ork already.(5) eric _ just _ (go) back to his hometown.have studiedhave 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 tha

6、t were completed only a short time ago. the police have just finished searching 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 verbste

7、p 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 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

8、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 have not been sleeping well since i returned home. past _ presentnot being able to sleep welli returned home.im still not sleeping well.3

9、. 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 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 observing have been talking have been taking have seen have been writing1990-present: crop circles are so interesting1990-present: crop circles are so interesting