必修3第四单元单词|必修3第四单元Avisittothemoon导学案

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第四课时    a visit to the moon
teaching aims:
to read and understand the text.
to master the new words and useful expressions.
课前预习：
一．单词学习
1.拉力；牵引力                    2.宇宙飞船               
3.欢呼                            4.漂浮                   
5.团；块；质量                 
二．词组学习
1.为……欢呼                      2.既然                   
3.熟悉；掌握                           
4.做一次旅行                    
5.爆发              
课堂学习 
task 1: fast reading
ask the students to read the passage and then describe three ways in which gravity changed for li yanping and how his weight changed.
                the way gravity changed              how his weight changed
left the earth                                                                 
in space                                                                       12
on the moon                                                                   
task 2: careful reading
get the students to read the passage again carefully and underline the useful expressions.
1. li yanping explained to me that the force of gravity would change three times on our journey…
2. i cheered up immediately and floated weihttlessly…
3. last month i was lucky enough to have a chance to make a trip …
4. ‘walking close need a bit of practice now that gravity has changed.’
task 3 language points
1. twice as far as表示倍数，
例句:
the road is twice as wide as that road.
这条路是那条路的两倍宽。
相关链接:
此类相似结构还有:倍数+比较级;倍数+what;倍数+抽象名词等。例如:
what i get is twice more than mr wang.
我所得比王先生多两倍。
the room is twice the size of my brother’s room.
这屋子是我哥哥屋子的两倍大。
2. break out 战争（火灾等不愉快事情）发生
例句:
several scuffles broke out in the crowd.
人群中发生了几场混战。
when the fire broke out,many workers had escaped.
火灾发生时，很多工人早已逃走了。
相关链接:
break in 打断，侵入，打岔
break up 拆散，打碎
break down 分解，不成功，毁坏
break into 闯入;破门而入
break through 突破（障碍），显现
break away from 逃走，从……中脱离
随堂检测
根据首字母提示，填写所缺单词的正确形式。
1.the bird flu was s     in the city.
2.the crowds c    up when they saw the team arrive.
3.the stone rolled down the hill by the g    .
4.o    is meccessary for all forms of life.
5.the enemy boat was f      aimlessly on the sea.
单项填空
1. the house rent is expensive.i have got about half the space i had at home and i am paying ______ here.
a.as 3 times muchb.as much three times
c.much as 3 timesd.3 times as much
2. in dry weather the flowers will have to be watered if they _____.
a.have survived　b.are to survivec.would survive  d.will survive
3. _____ your father have bought a new bike for you,it’s no use going to the shop to buy another one.
a.now that  b.althoughc.after all  d.because of
4. the heavy rain _____ us visiting the attractive lake,but we didn’t _____.
a.prevented;lose the heartb.prevented;lose heart
c.kept;lose the heartd.kept;lose the heart
homework
read the text.
revise the useful expressions.12

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