Unit1TalesoftheunexplainedGrammarandusage1课件(牛津译林版必修2).pptVIP

* Tales of the unexplained Grammar and usage Unit 1 Present perfect tense Present perfect continuous tense 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 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 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 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. It’s well written. (4) The student ______________ (finish) her homework already. (5) Eric _____ just _____ (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 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 verb Step 3 Read the diary entry and