状语从句

课件13张PPT。状语从句 路庄中学：郑香满状语从句是中考词汇和句法部分考查的重点内容之一。状语从句主要包括时间状语从句,原因状语从句,条件状语从句,结果状语从句,目的状语从句，比较状语从句, 让步状语从句等。在复习状语从句时,主要任务是弄清楚引导各种状语从句的连词的用法。1.引导时间状语从句的连词
　　主要有when, while, as, by the time, before, after, since, till/until, as soon as等。其中when, while和as都可表示"当……时候",但用法有区别:
　　①when意为"在……时;当……时",可表示"时间点"或"时间段",从句谓语可以是终止性动词,也可以是延续性动词。例如:
　　When I got home, he was having supper.
　　②as意为“边……边……”或“与……同时”,重在表示两个动作同时发生并伴随进行。例如:
　　They sang as they danced.
　　③while只可表示"段时间",从句谓语只限于延续性动词。例如:
　　While I was sleeping, my father came in.
　　注:从句谓语是持续性动词时,when、while和as可以互换,主、从句谓语都是终止性动词时,when与as可互换,从句谓语表示状态时,通常用while。
注意：在时间状语从句中，如果主句是祈使句或是叙述还未发生的动作，从句应用一般现在时表示动作将要发生。（主将来，从现在） 如：
Don’t get off the bus until it stops. 车停下来之前不要下车。
I’ll phone you after I get home. 我到家后就给你打电话。单项选择
( )1.We’llgive her the book when we ___her tomorrow.
A.see B.will see C.seeing D.is seeing
( )2.—Tomorrow will be Father’s Day. What will you do for your father?
--I’ll say “I love you, Daddy” as soon as he___ up.
A.will wake B.wakes C.is waking D.woke
( )3.He slept ___he was listening to music last night.
A.when B.before C.after D.while
A BD2.引导原因状语从句的连词
　　原因状语从句一般由because, since, as, for引导.注意as, because, since和for的区别:
　　①如果原因是构成句子的最主要部分,一般用because。because引导的从句一般不放在句子的开头。例如:
　　I missed the train because I got up late.
　　注:对于以why开头的问句,一般只能用because引导的从句来回答。
　　②如果原因已为人们所知,或不如句子的其余部分重要,就用as或since、since比as稍微正式一些。as和since引导的从句一般放在句子的开头。例如:
　　As he was not well, I decided to go there without him.
　　Since this method doesn't work, let's try another.
　　③for表示所说的理由是一种补充说明,因此,for引导的从句可以放在括号里,而且for引导的从句一般不放在句子的开头。例如:
　　I decided to stop and have lunch, for I was feeling quite hungry.3.引导结果状语从句的连词
　　主要有so/such…that…,so that等。
　　1) so...that结构在某种情况下可以与enough to和too...to结构相互转换。例如:
　　She is so short that she can't reach the buttons of the lift. =She is too short to reach the buttons of the lift.
　　2)so that也可以引导结果状语从句,意为"结果是;以致于"。例如:
　　They missed the bus so that they were late for class.
　　注:so that也可引导目的状语从句,此时可用in order that 替换，也可用to或in order to替换为简单句。
　　He got up early so that he could get to school on time. =He got up early to get to school on time. =In order to get to school on time, he got up early. ( )1.He is __ young __ he can’t carry the box.
A.very,that B.so, that C.too, to D.so, to
( )2.He got up very early ____ he caught the early bus.
A.in order to B.to C.so that D.such that
( )3.There is ___ little water in the jar __ the bird can’t drink.
A.so, that B.such, that C.a,that D.very,that
( )4.He is __ little boy __he can hardly speak.
A.so, that B.such, that C.a,that D.very,thatBCA B4.引导条件状语从句的连词
主要有if(如果）unless（除非）
注意：在条件状语从句中，如果主句是祈使句或是叙述还未发生的动作，从句应用一般现在时表示动作将要发生。（主将来，从现在）
You may go out to play if your homework is done.
但if作是否讲时，所用时态要根据句子意思(if表如果，主将来，从现在。if表是否，时态随句意）如:I don’t know if he will come to the party. If he comes, I’ll phone you.
( )1.Don’t eat the food on the table unless you ___ very hungry.
A.are B.will be C.are going to be D.is
( )2.What would you do if it____ tomorrow?
A.rain B.rains C.will rain D.is raining
( )3.Could you tell me if it ___ tomorrow. If it ___rain, we will go to the park.
A. is raining, won’t B.rains,doesn’t
C. will rain, won’t D. will rain, doesn’t
ABD比较状语从句：
as…as … (和…一样…）,not as/so…as…（…不如… ）, than（比）
An elephant is much bigger than a horse.
He is as clever as his brother.
She doesn’t study so hard as her sister.
让步状语从句：
Though/ although（尽管，虽然）, but（但是）, even if（即使，纵然）
注意：though/although 和but不能同时用在一句话中，二者只用其一。如：Though it is raining hard, all the students get to school on time. 或It is raining hard, but all the students get to school on time.
( )1.I don’t like bread. I won’t eat it ___I am very hungry.
A.if B.when C.as D.unless
( )2.I’m going to look for another job __ the company offers me more money.
A.after B.when C.unless D.besides
( )3.—Did you see who the driver was?
--No, the car ran so fast ___I couldn’t get a good look at his face.
A.that B.which C.as D.after
( )4.--__do you like theCool Kids?
--Because they look cool.
A.What B.How C.Why
( )5.Peter was late for the meeting___he missed the train.
A.though B.because C.while D.ifDCACB( )6.If you ___late tomorrow morning,you won’t catch the early bus.
A.get up B.don’t get up C.will get up
( )7.I’ll do it better if the teacher___me another chance.
A.give B.gives C.gave D.will give
( )8.The box is __heavy __I can’t carry it.
A.too, to B.so, that C.very, that D.too, that
( )9.Nowadays science fiction isn’t as__as cartoons among teenagers.
A.popular B. less popular
C.more popular D. the most popular
( )10.Do you know if __back next week? If he___ back, please let me know.
A.he comes, will come B.will he come, comes traveled
C.he will come, comes D.will he come, will comeABBAC比较状语从句,引导条件状语从句,让步状语从句,条件状语从句,结果状语从句原因状语从句,时间状语从句