TAILIEUCHUNG - Understanding and using english grammar 9

The present progressive expresses an activity that is in progress at the moment of speaking. It is a temporary activity that began in the past, is continuing at present, and will probably end at same point in the future. | 4. Mr. Ford is waiting in the dentist s office. He was waiting there for the last twenty minutes. He hopes the dentist can see him soon because he has a bad toothache. EXERCISE 11. Present perfect vs. present perfect progressive. Charts 3-1 and 3-2 Directions Use the present perfect or the present perfect progressive. In some sentences either tense may be used with little or no change in meaning. 1. It snow all day. I wonder when it will stop. 2. We have three major snowstorms so far this winter. I wonder how many more we will have. 3. It s ten . I study for two hours and probably won t finish until midnight. 4. I write them three times but I still haven t received a reply. 5. The telephone ring four times in the last hour and each time it has been for my office mate. 6. The telephone ring for almost a minute. Why doesn t someone answer it 7. A you be able to reach Bob on the phone yet B Not yet. I try for the last twenty minutes but all I get is a busy signal. 8. A Hi Jenny. I see not you for weeks. What you do _ lately B Studying. Perfect and Perfect Progressive Tenses 43 9. A What are you going to order for dinner B Well I have never vegetarian pizza so I think I ll order that. 10. A What s the matter Your eyes are red and puffy you cry _ B No. I just finished peeling some onions. 11. A Dr. Jones is a good teacher. How long he be at the university B He teach here for twenty-five years. 12. The little girl is dirty from head to foot because she play in the mud. EXERCISE 12. Present perfect and present perfect progressive with SINCE and FOR. Charts 3-1 and 3-2 Directions Complete the sentences with your own words. 1. . . . since eight o clock this morning. - I have been sitting in class since eight o clock this morning. - I have had three classes since eight o clock this morning. 2. . . . since I came to . . 7. . . since the beginning of this century. 3. . . . since year . 8. . . since . 4. . . . since month . 9.

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