初二英语《现在完成时》PPT课件.ppt

1、Module 3,Journey to space,1. Have you heard the latest news? 2. Some scientists have sent a spacecraft to Mars. 3. And have the astronauts discovered life on Mars? 4. But astronauts have already been to the moon.,Language practice,Grammar,现在完成时(2),Grammar,现在完成时用在什么地方呢？,当我们要表达“某人曾经做过某事”, “某人已经做了某事”等意

2、思时, 英语要用“现在完成时”来表达。,否定句 I have not worked. He/She has not worked. They have not worked.,肯定句 I have worked. He/She has worked. They have worked.,havent,hasnt,havent,现在完成时的结构： has/have + done (动词过去分词),现在完成时的肯定形式是： 现在完成时的一般疑问句形式是：,She / He / It / 或人物的单数形式,has done sth,I/We/You/They或人物的复数形式,have done st

3、h,现在完成时的一般疑问句形式是：,Has done sth?,she / he / it / 或sb的单数形式,Have done sth?,I / we / you / they / 或sb的复数形式,我父母曾经坐船去大连旅游。 她已经完成作业。 我父母未曾坐船去过大连旅游。,My parents have travelled to Dalian by ship.,She has done (finished) her homework.,My parents havent travelled to Dalian by ship.,她还没有完成作业。 你父母曾经坐船去大连旅游吗？ 她已经完

4、成作业了吗？,Have your parents travelled to Dalian by ship?,Has she done (finished) her homework?,She hasnt done (finished) her homework.,要表达“刚刚做完某事”、“已经做完某事” 时，我们同样可以用现在完成时。如: I have just heard the news. Astronauts have already been to the moon.可以看出，just 用来表示“刚刚”，already 用来表示“已经”，一般置于have/has之 后，两者都用于肯定句

5、，在否定句中则要 用yet,表示“还（未）”。如： The scientists havent heard from it yet.,have been to 与have gone to 的区别,1. have (has) been to意为“曾经去过某地”，表示现在已经不在那里了。可与just, ever, never等连用。如：,Ive just been to the post office. 我刚才去邮局了。 Have you ever been to Hangzhou? 你曾经去过杭州吗？ Mary has never been to the Great Wall. 玛丽从未去过长城

6、。,have (has) been to 后面可接次数，表示去过某地几次。 Ive been to Beijing three times. 我去过北京三次。 They have been to that village several times. 他们已经去了那个村庄好几次了。,have been to 与have gone to 的区别,2. have (has) gone to 意为“到某地去了”，表示到了某地或正在去某地的途中。总之，说话时该人不在现场，一般不用第一、第二人称代词作句子的主语。如： Where is Tom? 汤姆在哪里？ He has gone to the boo

7、kshop. 他到书店去了。,have been to 与have gone to 的区别,与现在完成时连用的几个副词： 肯定句: 疑问句和否定句: yet 常置于句末 already, never, ever, just一般置于 助动词have/has之后，过去分词之前。,already, just, ever, yet, never,already, just,ever, yet, never,A: Have you ? B: Yes, / No, (using already, just, ever, yet, never),1. They havent been to Mars. (

8、yet ) _ 2. Many astronauts have visited the space station. ( already ) _ _,Many astronauts have already visited the space station.,They havent been to Mars yet.,Put the words in the correct place in each sentence.,3. The spacecraft has reached Mars. ( just ) _. 4. Weve known that there isnt any life

9、 on the moon. ( already ) _ _.,The spacecraft has just reached Mars,Weve already known that there isnt any life on the moon,5. We have started to look at other planets. ( just ) _ _. 6. The space shuttle has returned from a visit to the space station.( just ) _ _.,We have just started to look at oth

10、er planets,The space shuttle has just returned from a visit to the space station,we / just / TV / programme / on / a / watch / have /. _ _.,We have just watched a programme on TV,Put the words in order to make sentences.,2. on / discovered / yet / life / they / Mars / havent /. _ _ 3. already / astr

11、onauts / landed / moon / on / the / have. _ _,They havent discovered life on Mars yet.,Astronauts have already landed on the moon.,Look at these sentences. The astronauts have gone to the space station. Theyve gone there, but they havent come back. The astronauts have been to the space station.,They

12、 went there and they came back.,1. Astronauts have been / gone to the moon and returned safely. 2. The spacecraft has been / gone into space. It wont return. 3. The space shuttle has been / gone to the space station. It will come back tomorrow. 4. The space shuttle has been / gone to the space stati

13、on. It brought back two astronauts.,Choose the correct words.,Complete the sentences with the expressions in the box.,1. A spacecraft _to Mars. Its coming back to Earth next year.,2. Lots of astronauts _to the space station. They found it very interesting.,has gone,have been,have / has been have / h

14、as gone,3. Some American astronauts_ to the moon several times.,4. A British astronaut _ to the space station. Hell come back in January.,have been,has gone,Complete the passage with the correct form of the verbs. Nicky: Ive just (1)_ (see) a great TV programme about space. Did you know that scienti

15、sts have (2)_ (discover) water on Mars?,seen,discovered,Bill: No! Really? Thats very interesting. (3)_ they _ (try) to find life on Mars? Nicky: Well, theyre looking for life but they (4) _ (not find) anything yet.,Have,tried,havent found,Bill: Theyve already (5)_ (find) that theres no life on the m

16、oon. Nicky: Yes, thats right. So far theres only life on earth.,found,Complete the passage with the words in the box.,Dear Diary, Ive (1)_ finished reading a great book at school. I havent (2)_ anything as good as that for a long time! It is a book about the solar system. It is so good,read,just,alr

17、eady been havent just never read written yet,that Ive (3)_ asked the library to keep the next book for me! In the book, it says that astronauts have (4)_ to Mars and even to Jupiter. Ive (5)_ read that before! I think theyre keeping it secret! I (6)_ met anyone famous in my life but I hope one day I

18、ll meet a real astronaut.,already,been,never,havent,Ive (7) _ to NASA to ask them for more information about astronauts and space. I hope they write back. They havent (8) _, but Im sure they will soon. Best wishes, Mary,written,yet,Listen to this interview and choose the correct answers.,(1) The ast

19、ronaut joined NASA _. a) four years ago b) six years ago c) seven years ago,(2) The astronaut has flown in a spacecraft _. a) once b) three times c) four times,(3) The astronaut has been to the space station _. a) once b) twice c) ten times,(4) The astronaut has been seen_. a) the Earth from the spa

20、ce station b) the moon from the space station c) the Earth from the moon,(5) When he was on the space station the astronaut thought about his family _ a) all the time b) several times c) from time to time,solar system,Milky Way,SPACE,mission,unmanned,space shuttle,astronaut,explore,Word map,discover

21、,find,spacecraft,galaxy,Space station,discover find galaxy spacecraft space station,Individual activity,Exercise,Check Answers,Many students like writing a _ every day. 2. Most of the children dont want o tell _ to their parents.,从方框中选择适当的单词并用其正 确形式完成句子。,even real secret twice diary,diary,secrets,3.

22、 Have you been to Shanghai _? Yes, I have. 4. Are there any Spidermen in the _ world? 5. Now the air in our hometown is _ worse than it was before. So we must do something to stop it.,twice,real,even, Peter, have you finished your homework? Yes, Miss Lin. Ive _ finished it. 2. What are you going to

23、do this Sunday? I havent decided _. 3. Shall I tell Sally about it? No, you neednt. Ive told her _.,. 用already，yet 和just完成句子。,just,yet,already,4. Mr Smith phoned you _ now. He asked you to call him back. 5. Have you read the book Who moved my cheese? Yes, I have _ read it several times. 6. Haveyouvi

24、sitedMountain Tai_? Yes, I went there last week.,already,yet,just,1. Wheres Uncle Black? I cant find him. He _ _ (go) to Sichuan to help people in a disaster area (灾区). 2. _ you ever _ (eat ) Beijing roast duck? Yes. Its delicious. 3. I have _ _ (not see) Water Margin (水浒) . Really? I _ (see) it yesterday.,III. 用括号内所给动词的适当形式完成句子。,has gone,Have eaten,never seen,saw,4.