unit 6 Enjoying Cycling/topic 3 Bicycles are popular.

八年级英语学案（下）25
Unit 6 Topic 3 Section A
课型：新授 执笔:李亮存 修改：八年级英语组 日期：2010.4.10
【学习目标】
学习if 引导的条件句。 2.谈论自行车的用途及优缺点。
【重点难点】
If 条件句的用法。
【预习导航】
学会并掌握下列单词，在课文中画出来。
passenger crazy anywhere pollution imposible death
shatp slow down opposite rush hotline policeman
阅读1a,1c和2a,找出下列短语和句子并写下来。
①你会很快习惯的。 _________________________________________
②在任何地方我都不敢骑自行车。______________________________
③如果人们遵守交通规则，事故就会更少。_______________________
④停放自行车也容易。
⑤大多数人认为自行车必其它交通工具更安全。
____________________________________________________________
⑥骑自行车能帮助我们节约能源并且不会产生空气污染。
_____________________________________________________________
⑦在公众场合吐痰不好。__________________________________________
⑧有时自行车交通事故确实会发生。_________________________________
⑨几米远的地方有一个向左拐的急转弯。 ____________________________
⑩突然一辆卡车从对面驶来。______________________________________
⑾为避免撞上卡车，年轻人撞上了墙并重重地伤了胳膊。
________________________________________________________________
【知识链接】
1. I think traffic in Beijing is crazy.我认为北京的交通很拥挤。
①adj.“拥挤的” In some big cities,traffic is crazy.
crazy 在一些大城市交通很拥挤。
②adj.“不理智的，疯狂的”Are you crazy 你疯了吗？
2. if 意为“如果，假设，倘若”引导条件状语从句。由if引导的条件状语从句，若主句是将来时、祈使句或含有情态动词时，从句常用一般现在时。
如：I`ll go to see a film if I_______（有）time.
Please ring me up if you ________(到达) Beijing。
知识拓展 如果条件句中所“假定”的动作不会发生，可用unless(除非)接从句，相当于if…not。如：
I won`t go there I hear from you.我不会去那儿，除非我收到你的来信。
=I won`t go there if I don`t hear from you.
3．save energy 节约能源
类似词组：节约时间 save ________ 省钱 save _______
知识拓展save one`s life 救某人的命
4.air pollution 空气污染
类似搭配：水污染 water pollution 噪音污染 niose __________
光污染 light ________
知识拓展 pollute(动词)污染 ；polluter 污染源，污染者
5．avoid (doing) sth. 避免、避开(做)某事
I left early to avoid the rush hour.我早早离开以避开交通高峰阶段。
He wants to avoid _______ ______(谈论) his father.
6. be hurt 受伤，be badly hurt=hurt…badly 严重受伤
He fell from a tree and hurt his leg badly.= He fell from a tree and his leg ____ ___ _____.
【课堂活动】
小组探讨预习导航内容，掌握课文重点句子。
Learn Section A.
听1a录音，回答“Can Michale ride bicycle anywhere when he first arrived in Beijing ②完成1b和1c. ③探究2a疑难点并完成2b.
3.课文阅读风采展示。 4.知识反馈，布置作业。
【趁热打铁】
词汇城堡。
It`s __________(不可能的) 通learn English well if you don`t work hard.
There are too many __________ (乘客) in the bus.
If you have any trouble in a new city,you can ask a _____(警察) for help.
He must be c_______ to drive so fast. It`s so dangerous.
Birth and death are o__________.
You must s_______ down at a crossing or a sharp turn.
Don`t r______ across the street when there is lot of traffic. It`s dangerous.
二．我有“火眼金睛”，任你七十二变
( )1.—In such a cold day,you should wear more warm clothes to avold
_______ a cold. —Thanks. I will.
A. get B. getting C. catch D. to catch
( )2.—Evetyone should obey the traffic rules.
— _____OR there will be more accidents.
A. I agree B. I don`t agree C. I don`t thind so D. It`s hard to say.
( )3.If he ____ the early bus,she ___ there on time.
A. catches;will get B. will catch; will get
C. will catch; gets D. catches; gets
( )4.—Cycling can help us save energy.
—You`re right, It can help us keep healthy _____.
A.too B. also C. as well D. either
( )5.—Did you find your pet dog
—No.I look for it, but I couldn`t fid it ______.
A. anywhere B. everywhere C. here and there D. somewhere
【作业卡】
一．根据汉语意思完成句子。
1.她在这场交通事故中受了重伤。
She was _____ _____ ______ the traffic accident.
2.如果明天不下雨，我们就去春游。
We ______ _____ a spring trip if it ______ _______ tomorrow.
3.昨天汤姆撞到了一棵大树上。
Tom _____ ______ a big tree yesterday.
4.横穿繁忙的街道是很危险的。
______ very dangerous ______ _______ a busy street.
5.司机们在雨天应小心减速行驶。
Drivers should ______ ________ and take care in rainy day.
6.It is impossible to finish so much work in an hour.(同义句转换)
_____ _______ so much work in an hour is impossible.
7.Ask for help. You are in trouble.(用If 合成一句)
________________________________________________________
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注意啦！！