初二英语《现在完成时》PPT课件

3. The spacecraft has reached Mars. ( just ) ________________________________. The spacecraft has just reached Mars 4. We’ve known that there isn’t any life on the moon. ( already ) _______________________________ We’ve already known that there isn’t __________________. any life on the moon
5. We have started to look at other planets. ( just ) ________________________________ We have just started to look at other ______. planets 6. The space shuttle has returned from a visit to the space station.( just ) _______________________________ The space shuttle has just returned ___________________________. from a visit to the space station
Choose the correct words.
1. Astronauts have been / gone to the moon and returned safely. 2. The spacecraft has been / gone into space. It won’t 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 station. It brought back two astronauts.
have been to 与have gone to 的区别
have (has) been to 后面可接次数，表示 去过某地几次。 I’ve 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。
Look at these sentences. The astronauts have gone to the space station. They’ve gone there, but they haven’t come back. The astronauts have been to the space station. They went there and they came back.
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”等意思时, 英 语要用“现在完成时”来表达。
现在完成时的结构：
has/have + done (动词过去分词)
肯定句
I have worked.
否定句
haven’t I have not worked.
She has done (finished) her homework. 我父母未曾坐船去过大连旅游。 My parents haven’t travelled to Dalian by ship.
她还没有完成作业。 She hasn’t done (finished) her homework. 你父母曾经坐船去大连旅游吗？ Have your parents travelled to Dalian by ship? 她已经完成作业了吗？ Has she done (finished) her homework?
Complete the sentences with the expressions in the box. have / has been have / has gone
1. A spacecraft ________to Mars. It’s has gone
coming back to Earth next year.
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 bookshop. 他到书店去了。
Bill: They’ve already (5)_______ found
(find) that there’s no life on
the moon. Nicky: Yes, that’s right. So far there’s only life on earth.
Complete the passage with the words in the box. already been haven’t just never read written yet Dear Diary, I’ve (1)_____ finished reading a great just book at school. I haven’t (2)______ read anything as good as that for a long time! It is a book about the solar system. It is so good
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： I've 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。
I/We/You/They或人物的复数形式 have done sth
现在完成时的一般疑问句形式是：
Has she / he / it / 或sb的单数形式 done sth? Have I / we / you / they / 或sb的复数形式 done sth?
我父母曾经坐船去大连旅游。 My parents have travelled to Dalian by ship. 她已经完成作业。
know that scientists have
(2)__________ (discover) water on discovered Mars?
Bill: No! Really? That’s very interesting.
(3)_____ they _____ (try) to find life Have tried on Mars? Nicky: Well, they’re looking for life but they (4) haven’t found(not find) ___________ anything yet.
He/She has worked. He/She has not worked. hasn’t They have worked. They have not worked. haven’t
现在完成时的肯定形式是：
She / He / It / 或人物的单数形式 has done sth
现在完成时的一般疑问句形式是：
与现在完成时连用的几个副词： already, just, ever, yet, never 肯定句: already, just 疑问句和否定句:ever, yet, never 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。
the space station. He’ll come back
in January.
Complete the passage with the correct form of the verbs. Nicky: I’ve just (1)____ (see) a great TV seen
programme about space. Did you
Put the words in order to make sentences. 1. we / just / TV / programme / on / a / watch / have /. _____________________________ We have just watched a programme _____. on TV
Module 3
Language practice
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.
A: Have you… ? B: Yes, …/ No, … (using already, just, ever, yet, never)
Put the words in the correct place in each sentence.
1. They haven’t been to Mars. ( yet ) __________________________ They haven’t been to Mars yet. 2. Many astronauts have visited the space station. ( already ) Many astronauts have already visited _______________________________ the space station. ______________
2. Lots of astronauts have been _________to the space
station. They found it very interesting.
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3. Some American astronauts________ have been
to the moon several times. 4. A British astronaut ________ to has gone
2. on / discovered / yet / life / they / Mars / haven’t /. ________________________________ They haven’t discovered life on Mars ____ yet. 3. already / astronauts / landed / moon / on / the / have. Astronauts have already landed on ____________________________ the moon. _________
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，在否定句中则要 用yet,表示“还（未）”。如： The scientists haven’t heard from it yet.