《We have not found life on any other planets yet》journey to space PPT課件2
Revision
Scientists have sent spaceship to Mars. The journey has taken several months.
Astronauts have already been to the moon.
No one has been to Mars yet, because Mars is very far away, much farther than the moon.
Lots of scientists are working hard in order to send astronauts to Mars one day.
... ... ...
Read the passage and choose the best title for it.
1. Anyone out there?
2. Life on the earth
3. The sun and other stars
4. The stars at night
Check (√) the true sentences.
1. The earth is a star.
2. The sun is a star.
3. There is more than one galaxy in the universe.
4. The light from the stars in other galaxies has travelled for a long time to reach us.
5. Scientists have received many messages from space.
6. Spaceships have visited most of the universe.
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Language points
1. Scientists think that there has been life on the earth for hundreds of millions of years.
科學(xué)家認為地球上的生命已經(jīng)有億萬年了。
millions of 數(shù)百萬 hundreds of 數(shù)百
thousands of 成千上萬 billions of 數(shù)十億
e.g. There are billions of stars in the
Galaxy, and the sun is only one of them.
銀河系中有數(shù)十億顆恒星，太陽只是其中的一個。
2. However, we have not found life on any other planets yet.
然而，我們還沒有在任何其他行星上發(fā)現(xiàn)生命。
yet用于否定句和疑問句，意思是“還，尚”。not … yet的意思是“還沒，尚未”，表示某事物在某一時間尚未發(fā)生，但未來也許會發(fā)生。例如：
I haven’t learnt any farther information yet.
我還沒有得到進一步的信息。
Have you received her letter yet?
你收到她的來信了嗎？
3. The earth is a planet and it goes around the sun. Seven other planets also go around the sun.
地球是顆行星，它圍繞著太陽轉(zhuǎn)。此外還有七顆行星也圍繞著太陽轉(zhuǎn)。
太陽系的其他七顆行星：水星
(Mercury)、金星(Venus)、火星
(Mars)、木星(Jupiter)、土星(Saturn)、
天王星(Uranus)、海王星(Neptune)。
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What have the scientists just received?
(a message from one of our spaceships)
They have just received a message from one of our spaceships.
1. Where has the spaceship landed? (Mars)
It has landed on Mars.
2. What has the spaceship discovered? (people on Mars)
It has discovered people on Mars.
3. Why have the people on Mars not sent us a message? (do not know how to)
We do not know how to send us a message.
4. Why have the people on Mars not visited us on the earth? (do not know how to)
We do not know how to visit us on the earth.
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中考鏈接
1. — Where’s Mr Green?
— He _____ to Changsha. (2013湖南湘西)
A. have been
B. has gone
C. has been
2. — Is Tom at home?
— No, he______ to town. (2013天津)
A. has been B. has gone
C. goes D. will go
3. He promised to pick me up at the school gate. However, he _____ yet. (2011安徽)
A. didn’t arrive B. doesn’t arrive
C. isn’t arriving D. hasn’t arrived
... ... ...
關(guān)鍵詞：《We have not found life on any other planets yet》教學(xué)課件，外研版八年級下冊英語課件，八年級英語幻燈片課件下載，《We have not found life on any other planets yet》PPT課件下載，.ppt格式
