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1、Grammar and usage,Unit,1,Present perfect tense Present perfect continuous tense,Unit 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 tense,Step 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
2、used in these sentences.,The disappearance of Justin _ (make) Kelly very unhappy.,has made,1. 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 seen,2. We
3、 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 just lately never recently since
4、 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 homework already. (5) Eric _ j
5、ust _ (go) back to his hometown.,have studied,have lived,have read,have finished,has 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 on
6、ly 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 verb,Step 3 Read the diar
7、y 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 tense,1. Form: have / has been + the prese
8、nt 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 _ Present,not being able to sleep well,I returned home.,Im still not sleeping well.,3. We also
9、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 Present,Mavis started waiting for Kelly.,Kelly ar
10、rives.,have been observing,have been talking,have been taking,have seen,have been writing,1990-present: Crop circles are so interesting,1990-present: Crop circles are so interesting to study!,I(4) crop circles too.,have been studying,Prepare Grammar and usage on page 10-11. 2. Finish Part C1 and C2 on page 88 in Workbook .,Homework,