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

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