初中英语条件状语从句语法点和习题(含答案)
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语法点拨:if与unless引导的条件状语从句
1.常用引导词:if(如果),unless(除非)。
I won’tgo to the movies unless I am fre
e tomorrow.
除非我明天有空,否则我不会去看电影。
2.条件状语从句的位置
可放在句首或句尾,放在句首时常用逗号与主句隔开。
e.g.If it rains tomorrow, I will stay at home.
= I will stay at home if it rains to
morrow.
如果明天下雨我就呆在家里。
3.if引导词用法
if引导的条件句有:真实条件句和非真实条件句两种。
真实条件句:表示在某种条件下某事很可能发生。
e.g.Ifyou ask him, he will help
you.
如果你请他帮忙,他会帮你的。
4.unless引导词用法
固定搭配:unless=if...not除非,若不,如果不 e.
g.You will fail to arrive therein ti
meunless you start earlier.
=If you don’t start earlier, you will f
ail toarrive there in time.
如果你不早点动身,你就不能及时赶到
那儿。
注意:在含有条件状语从句的复合句中,当主句是一
般将来时态,从句要用一般现在时(即主将从现原
则)。如果主句是祈使句或含有情态动词时,从句也
用一般现在时表将来。
e.g.If you study hard, you willpass t
he exam.
1.Iwillsend youane-mail assoonasI____A___inCanada.
A.arriveB.arrived C.am arriving D.will arrive
2.If there____A___no buyingand selling ofanimals,there______no killinginnature.
A.is;willbeB.willbe;will be C.is;isD.will b e;is
3.I’mwaitingformyfriend.__C___,I'll goshopping alone.
A.Ifshe comes B.If she won'tcome C.If she does n'tcome
5.You can’t watch TV___A_____you finish yourhomework.
A.unless
B.if
C.while
D.as
7.Thestudents_____A___have a sports meetin
g this weekend if it___.
A.won’t;rains B.will;rains
C.won’t;willrainD.are going to;isgoingtorain
9.I don't knowif she____B___tomy birthday party to morrow.If she______,I'll beveryhappy.
A.comes;comes B.will come;comes es;willcome
10.—When will youcome to Daqing?—Iwill call you___D__Iarrive.
A.till B.while C.as quicklyas D.assoon as
11.I’ll give it to Jimas soon as I___C____him tomorrow.
A.sawB.willsee C.see D.have seen