1、Unit 8,Unit 8 Have you read Treasure Island yet?,Section A 3 Grammar focus-4c,Revision,Read the following sentences we have seen.,Have 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 writ

2、e about yet? Yes, I have. Ive already finished reading it. It was really good.,用法 1. 表示過(guò)去發(fā)生或已經(jīng)完成的某一動(dòng)作 對(duì)現(xiàn)在造成的影響或結(jié)果。 e.g. Have you had your lunch yet? Yes, I have. Ive just had it. (現(xiàn)在 我不餓了。) 2. 表示動(dòng)作或狀態(tài)從過(guò)去某一時(shí)刻開(kāi)始，一直延續(xù)到現(xiàn)在，而且可能還要繼續(xù)下去。,現(xiàn)在完成時(shí),e.g. I havent seen her these days. Ive known Bob for three years

3、. Ive been at this school for over two years.,時(shí)間狀語(yǔ) already, yet, just, ever, never, before,構(gòu)成 現(xiàn)在完成時(shí)是由“助動(dòng)詞have / has+ 動(dòng)詞的過(guò)去分詞”構(gòu)成的，規(guī)則動(dòng)詞的過(guò)去分詞構(gòu)成與過(guò)去式相同，不規(guī)則動(dòng)詞的過(guò)去分詞則需逐個(gè)記憶。,動(dòng)詞的過(guò)去式的變化和過(guò)去分詞的變化并不完全相同。我們對(duì)它們作了一個(gè)大致的分類(lèi)。 (注：例子中單詞的變化順序?yàn)椋簞?dòng)詞原形 動(dòng)詞的過(guò)去式 動(dòng)詞的過(guò)去分詞),一、過(guò)去式和過(guò)去分詞的變化相同 規(guī)則變化： 1. 一般在動(dòng)詞詞尾直接加ed。如： pick picked picked

4、; wish wished wished; stay stayed stayed 2. 以不發(fā)音的e結(jié)尾的動(dòng)詞后面加d。如：like liked liked; hope hoped hoped; phone phoned phoned,3. 以“輔音字母 + y”結(jié)尾的動(dòng)詞，變y為i，再加-ed。如： study studied studied; hurry hurried hurried; reply replied replied 4. 詞尾只有一個(gè)輔音字母的重讀閉音節(jié)動(dòng)詞，要雙寫(xiě)輔音字母，再加-ed。如：stop stopped stopped; clap clapped clapped

5、,不規(guī)則變化： 5. 以不變應(yīng)萬(wàn)變。如： let let let; put put put; read read read 6. 若中間有雙寫(xiě)e，則去掉一個(gè)e，單詞末尾再加t。如： feel felt felt; keep kept kept; sleep slept slept,7. 結(jié)尾的字母d變t。如： lend lent lent; build built built; send sent sent 8. 變?yōu)橐?ought或-aught結(jié)尾。如： buy bought bought; bring brought brought; catch caught caught; teach

6、taught taught,句式 1. 肯定句：主語(yǔ) + have / has + 過(guò)去分詞 (+ 其他) 2. 否定句：主語(yǔ) + have / has + not + 過(guò)去 分詞(+ 其他) 3. 一般疑問(wèn)句：have/ has + 主語(yǔ) + 過(guò)去 分詞(+ 其他),4. 特殊疑問(wèn)句： 特殊疑問(wèn)詞 (不是句子主語(yǔ)) + have / has + 主語(yǔ)+過(guò)去分詞 (+ 其他) 2) 特殊疑問(wèn)詞(是句子主語(yǔ))+have / has+ 過(guò)去分詞(+ 其他),already和yet都可以作為現(xiàn)在完成時(shí)的標(biāo) 志詞，但它們的用法不同。 already一般用于肯定句中。如： We have already

7、 cleaned up our classroom. 注意：already用于疑問(wèn)句中時(shí)通常表示驚奇。如： Have you finished your homework already? I cant believe it.,yet一般用于疑問(wèn)句和否定句中。如： Have you seen her yet? The bus hasnt come yet.,活學(xué)活用,1. Write the forms of the past tense and past participle: drink _ _ see _ _ find _ _ leave _ _ tell _ _,drank drunk

8、,saw seen,found found,left left,told told,Why is Mr. Yang still in the teachers office? Maybe he _ his work yet. A. doesnt finish B. hasnt finished C. havent finished,B,Exercises,4a Use the words in brackets to complete the conversations. 1. A: Would you like something to drink? B: No, thanks. _. (j

9、ust/ drink some tea) 2. A: I heard you lost your key. _? (find) B: No, not yet.,I have just drunk some tea,Have you found it,3. A: Do you know when Tom is leaving? B: _. (already/ leave) A: When _? (leave) B: This morning. 4. A: Is your sister going to the movies with us tonight? B: No. _. (already/

10、 see the film),He has already left,did he leave,She has already seen the film,5. A: What do your parents think about our plan? B: I _. (not/ tell them/yet),havent told them yet,4b Fill in the blanks with the correct forms of the words in the brackets. Sally _ (love) reading. In the morning she reads

11、 the newspaper and in the evening she reads books. She _ already _ (read) more than 100 different books. Her favorite kind of books is science fiction. She is interested in science and technology and loves to imagine what the world _ (be) like in 50 years.,loves,has,read,will be,She _ (finish) readi

12、ng a book about robots last week and _ (write) a book report about it next week for her French class. Every time she is in the library, Sally looks at the many books she _ (not read) yet and she cant wait to read them.,finished,will write,hasnt read,Groupwork,4c Complete the chart with information a

13、bout you and your friend.,A: What books have you already read? B: I have already read Tom Sawyer and Harry Potter. A: What do you think of them? B: Well, I think Harry Potter was exciting, but Tom Sawyer was a bit boring.,( )【2013廣西貴港】 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,中考鏈接,( )【2013黑龍江牡丹江】 Lunch? No, thanks. I_. A. will eat B. am e