外研版英语必修一课件：Module5 A lesson in a lab reading(共21张PPT)

使用形容词、副词的比较级时要注意的几个问题：
⑴在as…as 之间只能使用原级形容词（副词）。例如： 误：I have as less money as you do. 正：I have as little money as you do.
⑵切忌采用双重比较 比较级前可以用表示程度的修饰语来表示强调或程度， 但不可用more加比较级情势。例如： 误：His health is more worse than before. 正：His health is much worse than before.
For your friends are my friends and my friends
are your friends
比较级的用法 : 1.双方比较，表示一方超过另一方时，用 “比较级 +than”的结构表示。例如：
This book is better than that one. 这本书比那本书好。
The old woman is twenty times as old as her granddaughter. Or we can say: The old woman is twenty times older than her granddaughter. The old woman is about twenty times the age of her granddaughter.
He is five years older than I.
他比我大五岁。
I got up an hour earlier than the others. 我比其他人早起一个小时。
Look at the picture, if the baby is 3 years old, while her grandmother is 60 years old. We can say:

cold spoon.
• Secondly, ________ some potassium into the water. Thecnonacslutrsoionng light will be sreeaecnt,sand it lasts for a while.
• We can reach a __________ that potassium _____ with cold water.
(2) Pour a spoonful of potassium into the water.
Result
Conclusion
The potassium burns. Potassium reacts with cold water.
17
Discussion
• Do you like doing scientific experiments? • What should you pay attention to when you
9
Passage B Task: Write an experiment report
Can we put iron nails in wet air? rust
10
conclusion, method, result, aim, An ExpaerpimpeanrtaRteupsort
1. __A__im______: 2. __A__pp_a_r_a_tu_s_:
Method
3. __________:
(1)
(2) (3) Result
4. __C_o_n_c_lu_s_io_n_:
5. __________:
11
Scanning

shortest man in the worldzx
xk
12 years old
118 years old
The old woman is about ten times as old as her granddaughter. Or we can say: The old woman is about nine times older
Answer the questions:
1.What’s wrong with this sentence? Ball 2 is two times as big as bBaall 1. Correct:Ball 2 is twice as big as Ball 1.
2.The men are about 1.7meters tall,and the truck is three and a half times as high as the men,how high is the truck?
C:Mount Qumolangma is about six times the height of Mount Tai.
Winter in Harbin
Winter in Beijing
-20℃（cold/coldness） -5℃
A:Winter is four times as cold in Harbin as in Beijing.
3.The canna is 10(cm) big,and the king flower is ten times bigger than the canna,how big is the king flower?
Discuss in groups of three. Make sentences about the comparative sizes of the pairs. Use the words in the brackets .

ppt课件，可编辑
4.The closer you are,the more you’ll see. 你靠的越近，看到的就越多。 考点提炼 考查The more...,the more...句式 句子仿造 你越是努力，取得的进步就越大。 The harder you study,the more progress you’ll make.
ppt课件，可编辑
导练互动
重点单词 1.contract v.(使)收缩；和……订合同;n. 契
约，合同
When you heat a metal,it contracts. 当你给金属加热时,它会收缩。（回归课本P41）
ppt课件，可编辑
观察思考 If you ice the metal,it will contract. 如果你冷冻金属，它就会收缩。 We contracted with a shoe factory for 4,000 pairs of shoes. 我们和一家鞋厂签订了一份4 000双鞋的合同。 He made a two-year contract of employment with the firm. 他和那家公司签订了两年的雇用合同。
ppt课件，可编辑
归纳拓展 make a contract with 与……签合同 sign a contract签署合同 carry out a contract 履行合同 cancel a contract取消合同 break a contract违反合同 by/on contract按照合同；依约
ppt课件，可编辑
返回目录
Part II. Key Phrases.
I. Translate the following phrases: 1.与…一样_______th_e_s_a_m__e_a_s_______ 2.使…有条理_____p_u_t…__i_n_o_r_d_e_r _____ 3.在…底部_______at_t_h_e_b_o_t_to_m___o_f ___ 4.在…顶部_______at_t_h_e_t_o_p_o_f_______ 5.以…形式_______in__th_e_f_o_r_m__o_f_____ 6.与…反应_______re_a_c_t _w_i_th_________ 7.做试验_________m_a_k_e_a_n__e_x_p_er_i_m_e_n_t_ 8.…的混合物_____a_m_i_x_t_u_re__o_f ________ 9.得出结论_______ar_r_iv_e__a_t/_r_e_a_ch__a_c_o_n_c_lusion 10. 往…加入…___ad_d_._.._to_._..___________ 11. 想，考虑_____th_i_n_k_o_f_____________ 12. 把…关在外面keeppp.t课..件o，u可t 编o辑f ____________________