教学目标: 掌握带if的条件状语从句的一般规则。
学习方法:自主学习 合作探究 精讲点播 巩固检测
一.自主学习
1.要求每一位学生模仿课本中带if的条件状语从句,每人写一个类似的句子,然后每组挑一同学板书一句。
2.让学生观察黑板上的句子,找出带if的条件状语从句的基本构成。
二.精讲点播
1 精讲
在句子中用来修饰动词、形容词、副词以及全句的成份,叫状语。
在主从复合句中起状语作用的从句叫做状语从句。
状语从句的位置可以在主句之前,在主句前时加逗号;也可以在主句之后,此时不用加逗号。
Eg: If the green light isn’t on ,wait a minute .
Print the photo if you like .
含有If引导的条件状语从句的复合句有主句和从句构成。if引导的是完整的句子,一定要有主语,称为从句,另一个句子称为主句,即:祈使句+if条件状语从句。或if条件状语从句+祈使句。
时态:在以if条件状语从句中,如果主句为祈使句或主句时态是一般将来时,从句通常用一般现在时。 2练习用括号中所给词的正确形式填空。
(1) If you ______ (want) to know how it works, _____ (read) the instructions.
(2) If you ________ (want) to listen to music, _________(choose) a CD. (3) If you _____ (buy) a new camera, ______(get) a good one
(4) If the light_____________ (not come) on, _____(wait) for one minute
3.选择
1).If you _____ to the party, you’ll have a great time.
A. will go
B. went
C. go
D. going
2). It will be a long time ____ Peter _____ his work.
A. since, has finished
B. after, finishes
C. when, will finish
D. before, finishes.
3). I’ll wake you up when he ____back.
A. will
B. is going to come
C. comes
D. come
4).I ____ her the answer if she ____me.
A. can tell, will ask
B. will tell, will ask
C. would tell, ask
D. will tell, asks
5). What will you do if you _____ to the old folk’ s home visit?
A. go
B. went
C.going
D. will go
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