初中現(xiàn)在完成時講解(完整版)25382通用PPT課件

1、The Present Perfect tenseWinter has already come，will it still be far in spring ?冬天已經(jīng)來了，春天還會遠嗎？present(now)futurepastPresent Perfect Tens現(xiàn)在完成時1.現(xiàn)在完成時表示過去發(fā)生或已完成的動作對現(xiàn)在造成的影響； I have already had breakfast.（我已吃過早餐，我不餓了）2.現(xiàn)在完成時態(tài)還表示過去某一時間已經(jīng)開始并一直持續(xù)到現(xiàn)在（包括現(xiàn)在在內(nèi)）的動作或狀態(tài)，可以和表示延續(xù)的時間狀語連用表示持續(xù)的動作或狀態(tài)的動詞多是延續(xù)性動詞。 We hav

2、e lived here for ten years/ since 10years ago.主語 + have/ has + 過去分詞（pp）助動詞,無意義 現(xiàn)在完成時的結(jié)構(gòu)Winter has already come，will it still be far in spring ?主語 + have/ has + 過去分詞（pp）否定形式 havent ( have not ） +過去分詞 hasnt ( has not ) +過去分詞疑問句 把助動詞 have / has 放在句首 現(xiàn)在完成時的結(jié)構(gòu)注：主語若是第三人稱單數(shù)助動詞用 hasYou have planted all the

3、trees.I have planted all the trees.He/she has planted all the trees.They have planted all the trees. 區(qū)別have 和 has的用法 主語若是第三人稱單數(shù)助動詞用 has1、regular verbs 規(guī)則變化（過去分詞與過去時變化規(guī)則一樣）(1)、一般動詞，在詞尾直接加“ ed ”。 work-worked-worked visit-visited-visited (2)、以“ e ”結(jié)尾的動詞，只在詞尾加“ d ”。 live-lived 過去分詞(3)、以“輔音字母 + y ”結(jié)尾的動詞，

4、將 “y” 變?yōu)?“i”， 再加“ ed ”。 study-studied-studied crycried-cried(4)、重讀閉音節(jié)結(jié)尾，末尾只有一個輔音字母，先雙寫該輔音字母，再加“ ed ”。 stop-stopped-stopped drop-dropped-dropped 2、irregular verbs不規(guī)則變化（A-B-B）havehadhad spend spentspent makemademade saysaidsaid findfoundfound hearheardheard 3、不規(guī)則變化（A-B-C）taketooktaken speak spokespoke

5、n singsangsung drivedrovedriven bewas/werebeen gowentgone 4、不規(guī)則變化（A-A-A）cutcutcutput putput letletletreadreadread 5 不規(guī)則變化 (A-B-A) come came come become became become 1) 表示到現(xiàn)在為止已經(jīng)完成或剛剛完成的動作。Now we have planted all the trees.He has just come back. They have built many buildings in this city. 現(xiàn)在完成時的用法2

6、) 表示過去發(fā)生的動作,強調(diào)結(jié)果或?qū)ΜF(xiàn)在的影響。Someone has broken the window. (窗戶現(xiàn)在是壞的)I have already lost the key. (我現(xiàn)在沒有鑰匙)I havent read that book yet . (不了解書的內(nèi)容)I have just cleaned my hands. (手是干凈的)常與already(已經(jīng)), yet(已經(jīng)), just(剛剛),ever(曾經(jīng)),never,for+時間段，since+時間點等詞或短語連用. already: 常用于肯定句中. yet: 常用于否定句,疑問句尾. 3) 表示從過去開始并持

7、續(xù)到現(xiàn)在的動作或狀態(tài)，常與包括現(xiàn)在在內(nèi)的一段時間的狀語連用。She has learned English for 5 years. He has lived in Beijing since 5 years ago.since: (自以來)1)since+時間點Hehasstayedheresince5oclock.2)since+ 時間段+ agoHehasstayedheresince5hoursago.3)since+ 從句ShehastaughtEnglishsincehecamehere. for: (長達）for+ 時間段He has kept the book for 2 we

8、eks.since , for 的用法: Take notes 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 w

9、orn glasses _he was 7 years old. for since forsinceforforsince注：并非所有for作為時間狀語的句子都用現(xiàn)在完成時 搞清一般過去時和現(xiàn)在完成時的區(qū)別I worked here for more than twenty years.(我現(xiàn)在已經(jīng)不在這里工作了)I have worked here for more than twenty years.（現(xiàn)在我仍在這里工作）疑難點辨析 have been to和 have gone toMy father has gone to Shanghai for a meeting.他（已經(jīng)）去了

10、上海。My father has been to Shanghai for a meeting.他（曾經(jīng)）去了上海。 She has been to China . 她（曾經(jīng)）去過中國。（人已經(jīng)回來了）have been to someplace. 曾經(jīng)去過某地，已經(jīng)回來has gone to someplace.某人去了某地，還沒有回來 She has gone to China.她去了上海 。（人可能回來了也可能沒回來）用have/has been to, have/has gone to填空：1.Where is your brother? He _ the shop. Hell be

11、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 toHave been tohave been tohave beenhave been tohas gone t

12、ohas gone to1. 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. 9. He _ (go) to school on foot every day. 10._ you _ (find) your science book yet? 11. If it _ (be) fine tomorrow, Ill go wit