人教新课标英语必修三课件 Unit 4 Astronomy：the science of the stars Using language课件(共29张PPT)

课件29张PPT。Unit 4 A visit to the moonLearning aims
Have a main idea of this passage and improve our reading skills.
2.Try to master the usage of “enough” and the expression of multiple.
3. Arouse our interest in science and astronomy.Revision according to
begin with
a cloud of dust
in time
cool down
chain reaction
as well as
lay eggs
give birth to
in one’s turn
prevent …from
as a result of
depend on 根据；按照以…开始；起源于一团尘埃及时；终于冷却连锁反应和下蛋产生；分娩轮到某人；接着阻止；制止由于；因此依靠，依赖；取决于1.What is more important is that as the earth cooled down, water began to appear on its surface.
更为重要的是，当地球冷却下来的时候，它的表面开始出现了水。
2.This produced a chain reaction, which made it possible for life to develop.
这就产生了连锁反应，使得生命发展成为可能。
3.As a result of this, many scientists believe the earth may become too hot to live on.
因此，许多科学家认为地球可能会变得太热而不适合生存。
www.themegallery.comLOGOwww.themegallery.comLOGOWho is the first Chinese astronaut to go into space?Which country first sent people up to space?
Yang Liwei.A. USA B.the Soviet Union C. Chinawww.themegallery.comLOGO
Armstrong (America, 1969).Who is the first man landing on the moon?So far, how many countries have succeeded in sending people up to space?Three.www.themegallery.comLOGOA VISIT TO THE MOONwww.themegallery.comLOGOEnjoy a piece of videowww.themegallery.comLOGOScanning1. Who do I travel to the moon with ?
2. How did we travel to the moon?
3. How many times would the force of gravity change on our journey?
Which change would be the most powerful?Li Yanping , an astronomerby spaceshipThree times ,
the first timewww.themegallery.comLOGOCareful readingLeaving for the moonwww.themegallery.comLOGOThe change of gravity (para.2,3)on the moonin spacegravity
(重力)very lightdisappearingstrongon the earthwww.themegallery.comLOGOThe change of my weightweight
(重量)on the moonin spaceon the earthone-sixthheavyno weightwww.themegallery.comLOGOCareful readingWalking on the moon What happened to me when I tried to step forward? Why?I was carried twice as far as on the earth and fell over.Because the gravity has changed.(Para.3)www.themegallery.comLOGOCareful readingReturning to the earthBecause fire broke out on the outside of the spaceship as the earth’s gravity increased.Why was returning to the earth very frightening?(Para.4)www.themegallery.comLOGO 1. Last month I was lucky enough to have a chance to make a trip into space with my friend Li Yanping, an astronomer.
上个月我有幸得到一个机会同我的朋友，一位宇航员李彦平一道去太空旅行。Language pointswww.themegallery.comLOGOenough的用法:
1)I have had enough. Thank you.
我吃的已经够多的了，谢谢。
2) I have enough time to do the work.
我有足够的时间来做这份工作。
3) The boy is old enough to go to school.
这孩子到上学的年龄了。
4)The meat is not cooked enough.
肉炖得不够熟。Can you summarize?www.themegallery.comLOGOenough1.pron.很多；充足 (作主语、宾语)
2.adj.充足的 (置于n.之前)
3.adv.足够地；充足地
(置于adj. v. adv.之后)www.themegallery.comLOGOIf I had __________________________ (一个足够长的假期), I’ll visit Paris, stopping at all the small interesting places.
We are _______________ to decide for ourselves.
我们已经到了自己做决定的年龄了。
a long enough holidayold enoughwww.themegallery.comLOGOtravel around the worldenough moneysleep well enoughwill not be sleepywww.themegallery.comLOGO2. But when I tried to step forward, I found I was carried twice as far as on the earth and fell over. 而当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。www.themegallery.comLOGO1) This tree is three times as tall as that one.
His father is twice as old as he.
2) The Yangtze River is almost twice longer than the Pearl River.
长江差不多比珠江长两倍。
The number of students in our school is three times larger than that in theirs.
　?? 我们学校的学生数量比他们学校的多三倍。
A + be + 倍数 + as +形容词原级 + as + BA + be + 倍数 +形容词比较级 + than + B www.themegallery.comLOGO 3) The new square is four times the size of the previous one. 新广场是之前那个的四倍大。 A + be + 倍数 + the +名词 (size, length, amount, height) + of + Bwww.themegallery.comLOGO1) 这个瓶子比那个大两倍。
This bottle is ________________ that one.
This bottle is ________________ that one.
This bottle is ________________ that one.A piece of cake~twice as big astwice larger thantwice the size ofwww.themegallery.comLOGOTom is _________________ Jerry.
Tom is _________________ Jerry.
Tom is _________________ Jerry.five times as tall asfive times taller thanfive times the height ofwww.themegallery.comLOGO1.Cats sleep twice much as people.
2. His house is three times large than mine.直击高考much前加aslarge改为largerwww.themegallery.comLOGOSummary Language Points:1. enough用法：
1)pron.很多；充足 (作主语、宾语)
2)adj.充足的 (置于n.之前)
3)adv.足够地；充足地
(置于adj. v. adv.之后)
2.倍数的表达：
1)
2)
3)A + be + 倍数 + as +形容词原级 + as + BA + be + 倍数 +形容词比较级 + than + B A + be + 倍数 + the +名词 (size, length, amount,height) + of + BThank You !