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1、Unit 8Have you read Treasure Island yet?Grammar FocusHave you read Little Women yet?Yes, I have./No, I havent.Has Tina read Treasure Island yet?Yes, she has. She thinks its fantastic.Have you decided which book to write about yet?Yes, I have. Ive already finished reading it. It was really good.现在完成时
2、：现在完成时： 结构：结构： 主语主语+ have / has + 动词的过去分词动词的过去分词一般疑问句一般疑问句： have / has ? Yes, I have. No, I havent. Yes, she has. No, she hasnt. 1.过去发生的动作对现在造成的影响或结果。过去发生的动作对现在造成的影响或结果。和和already，never,ever,just,before,yet等状语等状语连用。连用。动词构成：动词构成：have/has+v过去分词过去分词have breakfastI have just had my breakfast.(现在我不饿现在我不饿)
3、Im not hungry nowmoved herein 2004I still live here nowpast现在完成时的用法现在完成时的用法:(1)表示过去发生或已经完成的某一动作对现在造成的影响表示过去发生或已经完成的某一动作对现在造成的影响或结果。或结果。I have already read Treasure Island.I have returned the book to the library.I have bought a new house.现在完成时的时间状语现在完成时的时间状语: (1) 用副词用副词already和和yet。already一般用于一般用于肯定句
4、中肯定句中, yet一般用于否定句和疑问句中。一般用于否定句和疑问句中。We have already finished our homework.We havent finished our homework yet. Have you finished doing your homework yet? already一般用于肯定句，用于疑问句时表示惊讶，出乎意料。常放于句中，实义动词之前，助动词之后。yet一般用于否定句或疑问句。常放在句尾，not yet常用在答语中，意为“尚未；还没有”。(2) 用用ever和和never。多用于否定或疑问句中。多用于否定或疑问句中,表示表示“曾经曾经”
5、或或“从未从未”等。等。 Have you ever been to the Great Wall? 你曾经去过长城吗？你曾经去过长城吗？ No, I have never been to the Great Wall. 不不, 我从未去过长城。我从未去过长城。 No, never. 不，不， 从来没有。从来没有。现在完成时的时间状语现在完成时的时间状语: (3) 用副词用副词just和和before。I have just finished my homework.They have never visited the Great Wall before. Have you ever bee
6、n to Hong Kong before?(4) 用表示到说话为止的过去时间状语用表示到说话为止的过去时间状语, 如如so far/up to now, in the past/ last few years等等。So far we have learned seven unitsDeqing has changed a lot in the past / last few years.everjustalreadyyete.g. Have you _been to Japan? I have _ finished my homework. I have finished my homewo
7、rk _. I havent finished my homework _.（5）. just, already, yet, before/ ever, never有此有此类副词时类副词时,常强调动作完成常强调动作完成,不强调动作的持续不强调动作的持续. 现在完成时：现在完成时：表示过去发生或已经完成的某一动作表示过去发生或已经完成的某一动作对现在造成的影响或结果，或从过去开始一直延续对现在造成的影响或结果，或从过去开始一直延续到现在的动作或保存的状态，强调的是现在的情况，到现在的动作或保存的状态，强调的是现在的情况，不能和表示过去的时间状语连用（如：不能和表示过去的时间状语连用（如：in 1
8、990in 1990，last Sunday last Sunday 等）。等）。 一般过去时：一般过去时：一般过去时只表示过去的动作或状态，一般过去时只表示过去的动作或状态，和现在不发生关系（即动作或状态在现在已经结和现在不发生关系（即动作或状态在现在已经结束），它可以和表示过去的时间状语连用。束），它可以和表示过去的时间状语连用。现在完成时现在完成时与一般过去时的区别：与一般过去时的区别：have / has + V过去分词过去分词 现在完成时把过去的动作和现在的结果联系起来，现在完成时把过去的动作和现在的结果联系起来， 一般过去时只限于表示过去的动作本身一般过去时只限于表示过去的动作本身
9、, 与现在与现在 的结果无关。的结果无关。现在完成时与一般过去时在意义上现在完成时与一般过去时在意义上 的区别举例如下：的区别举例如下： I have cleaned my room. (My room is clean now.) 我已经打扫过我的房间了。我已经打扫过我的房间了。 I cleaned my room last week. (I did it in the past.) 我上周打扫了我的房间。我上周打扫了我的房间。 Father has gone to Amoy. (He went to Amoy and he is not here now.) 爸爸已经去厦门了。爸爸已经去厦
10、门了。 They have bought a dictionary. (They bought a dictionary and they have it now.) 他们买了一本字典。他们买了一本字典。注意注意: 现在完成时不能和明确指出时间的状语现在完成时不能和明确指出时间的状语(如如: yesterday, last, year, in 1976, two days ago, just now, when she came in 等等)连用连用，但可以和不明确指出时间的状语但可以和不明确指出时间的状语(如如: already, yet, ever, never, sometimes, a
11、lways, often, before, once, twice, recently, lately等等)连用连用；也可以和表示包括现在在内的时间状语也可以和表示包括现在在内的时间状语(如：如：today, this morning, this week, this year等等)连用连用。She has already finished her work. 她已经把工作做完了。她已经把工作做完了。I havent read the story yet. 我还没读过这个故事。我还没读过这个故事。Have you met him before? 你从前曾见过他吗？你从前曾见过他吗？Lily h
12、as always been a good student. Lily一直是个好学生。一直是个好学生。比较：比较：I have seen him this morning .我上午看见他了。我上午看见他了。(说话时在上午说话时在上午)I saw him this morning.今天上午我遇见了他。今天上午我遇见了他。(说话时可能是下午或者晚上说话时可能是下午或者晚上)It has been cold this winter. 今天冬天一直很冷。今天冬天一直很冷。(说话时仍是冬天说话时仍是冬天)NEXT把下列动词变成过去式和过去分词：read- - clean- -do- - watch- -
13、eat- - wash- -go- - finish- -see- - arrive- -find- - start- -readreadcleaneddidcleanedwatchedwatchedateeatenwashedwashedwentgonefinishedfinishedsawseenarrivedarrivedfoundfoundstartedstarteddoneExercisesBACKExercises:1.I have already watched the game show.(改为否定句）改为否定句） I _ _ the game show _.2.Sally s
14、aw the film last week.(改为现在完成时）改为现在完成时） Sally _ _ the film before.3.Tom has already finished doing his homework.(改为一般改为一般疑问句）疑问句） _ Tom _doing his homework_?4.Have they washed the clothes yet?(做肯定回答）做肯定回答） _,_ _.5.Has your brother eaten lunch? (做否定回答）做否定回答） _,_ _. havent watchedyethasseenHasfinished
15、yetYestheyhaveNohehasntFill in the blanks (用所给单词的适当形式填空用所给单词的适当形式填空)1._you _(find) your English book yet?2.I_(start) to make the plane an hour ago. But I_ (not finish) it yet.3._ he _(arrive) at the train station yet?4.When _ you _(read) the book? Two days ago.5.How clean the room! Im sure that some
16、one _(clean) it.6._ you _(see) the film Harry Potter? Not yet. Ill see it this Sunday.7.We _(go) to the zoo last weekend.Havefoundstartedhavent finishedHasarriveddidreadhas cleanedseenwentHave 句型转换句型转换1. I have finished my homework. I _ _ my homework. (改为否定改为否定句句)_ you _ your homework? (改改为一般疑问句并作肯定
17、回答为一般疑问句并作肯定回答)Yes，_ _. 答案：答案：1. havent finished Have；finished；I have2. His dream has come true. (改为一般疑问改为一般疑问句并作否定回答句并作否定回答)- _ his dream _ true? - No，_ _ . 答案：答案：2. Has；come；it hasnt 单项选择。单项选择。( )1. Have you taken out the trash, Belly? _. Ill do it right away. A. Sorry, I have B. No, I didnt C. No
18、, I dont D. Not yet( )2. Have you _ visited Shanghai? No, _. A. ever; not B. never; not C. ever; never D. never; everDC( )3. Have you washed your clothes _? No, I havent. But I have cleaned the room _. A. ago; already B. yet; yet C. before; yet D. yet; alreadyD(2010 .河北省卷河北省卷,41. 1) My brother left
19、school in 2005, and since then he in Beijing. A. lives B. lived C. will live D. has livedD( )【2013广西贵港广西贵港】 Do you know the movie Lost in Thailand? Yes. I _ it twice. Its funny. A. saw B. see C. have seen D. will see C( )【2013黑龙江牡丹江黑龙江牡丹江】 Lunch? No, thanks. I_. A. will eat B. am eating C. have eaten( )【2013 湖北黄冈湖北黄冈】 Where is Tom? We cant find him anywhere. Perhaps he _ home. A. has come B. is going C. went D. was goingCARetell what you did yesterday and what you have done now.