初中现在完成时讲解(完整版).ppt

The Present Perfect tense,Present Perfect Tense 现在完成时,主语 + have/ has + 过去分词（pp）,助动词,无意义,现在完成时的结构,Winter has already come，,will it still be far in spring ?,主语 + have/ has + 过去分词（pp）,否定形式 havent ( have not ） +过去分词 hasnt ( has not ) +过去分词,疑问句 把助动词 have / has 放在句首,现在完成时的结构,注：主语若是第三人称单数助动词用 has,You have planted all the trees. I have planted all the trees. He/she has planted all the trees. They have planted all the trees.,区别have 和 has的用法,主语若是第三人称单数助动词用 has,1) 表示到现在为止已经完成或刚刚完成的动作。 Now we have planted all the trees. He has just come back. They have built many buildings in this city.,现在完成时的用法,2) 表示过去发生的动作,强调结果或对现在的影响。 Someone has broken the window. (窗户现在是坏的) I have already lost the key. (我现在没有钥匙) I havent read that book yet . (不了解书的内容) I have just cleaned my hands. (手是干净的),常与already(已经), yet(已经), just(刚刚),ever(曾经)等词连用.,already: 常用于肯定句中. yet: 常用于否定句,疑问句尾.,3) 表示从过去开始并持续到现在的动作或状态，常与包括现在在内的一段时间的状语连用。 She has learned English for 5 years. He has lived in Beijing since 5 years ago.,since: (自以来) 1)since+时间点 He has stayed here since 5 oclock. 2)since+ 时间段+ ago He has stayed here since 5 hours ago. 3)since+ 从句 She has taught English since he came here. for: (长达） for+ 时间段 He has kept the book for 2 weeks.,since , for 的用法:,用for 或since填空,Mr. Brown has had his TV _ 15 years. Ive taken driving lessons _last month. My sister has had her cell phone _a month . My friends havent visited me _few days ago. We havent used our car _ a long time . She hasnt had a good cup of coffee _years. Tom has worn glasses _he was 7 years old.,for,since,for,since,for,for,since,注：并非所有for作为时间状语的句子都用现在完成时 搞清一般过去时和现在完成时的区别,I worked here for more than twenty years. (我现在已经不在这里工作了) I have worked here for more than twenty years. （现在我仍在这里工作）,疑难点,辨析 have been to和 have gone to,My father has gone to Shanghai for a meeting. 他（已经）去了上海。,My father has been to Shanghai for a meeting. 他（曾经）去了上海。,She has been to China . 她（曾经）去过中国。（人已经回来了）,have been to someplace. 曾经去过某地，已经回来 has gone to someplace.某人去了某地，还没有回来,She has gone to China last week. 上周她去了上海 。（人可能回来了也可能没回来）,用have/has been to, have/has gone to填空： 1.Where is your brother? He _ the shop. Hell be back soon. 2. _ you ever _ to America? Yes, I _ New York twice. 3. Here you are at last! Where _ you _? I _ London. 4. David _Australia. Im sure hes already arrived. 5. Is Benny here? No, he _ the school library. He left five minutes ago.,has gone to,Have been to,have been to,have been,have been to,has gone to,has gone to,9. He _ (go) to school on foot every day. 10._ you _ (find) your science book yet? 11. If it _ (be) fine tomorrow, Ill go with you. 12. The students _ (read) English when the teacher came in. 13. Look! The monkey _ (climb) the tree. 14. My mother _ (come) to see me next Sunday. 15. Ive lost my pen. _ you _ (see) it anywhere?,goes,have, found,is,were reading,is climbing,is coming,Have, seen,1. I_ already _ (see) the film. I _ (see) it last week. 2. _ he _ (finish) his work today? Not yet. 3. My father _ just _ (come) back from work. He is tired now. 4. Wheres Li Ming ? He _ (go) to the teachers office. 5. I _ (work) here since I _ (move) here in 1999. 6. So far I _(make) quite a few friends here. 7. How long _ the Wangs _(stay) here ? For two weeks. 8. I _ just _ (finish) my homework.,have, seen, saw,Has, finished,has, come,has gone,have worked, moved,have made,have, stayed,have, finished,1. have, seen, saw 2. Has, finished 3. has, come 4. h