2019初中三年级英语语法复习状语从句
1状语从句
在复合句中，修饰主句中的动词、形容词或副词等的从句叫状语从句。状语从句依据它表达的意思可分为时间、地址、缘由、目的、结果、让步、比较和条件等类。
1.时间状语从句
引导连词有when，while，till，notuntil，since，after ,before ,as soon as
The bus wont start until everybody gets on.
公共汽车直到每个人都上车为止，才开动。
When he knocked at the door I was cooking.
当他敲门时，我正在煮饭。
Last night before he came back home, his wife had already cooked dinner and waited for 2 hours.
昨天晚上在他回到家之前，他的老婆已经做好晚饭足足等了他两小时之久。
After I went to church, I went shopping.
2. 地址状语从句
地址状语从句一般由where, wherever 引导。
Where there is a will, there is a way. 哪儿有志向，哪儿就有出路。有志者事竟成。
Where there is a life, there is a hope. 哪儿有生命，哪儿就有期望。 留得青山在，不怕没柴烧。
Wherever you go, whatever you do, I will be right here waiting for you.
不管你去什么地方，不管你干什么，我都会在此守侯你。
3.缘由状语从句
引导连词有because，as, since。
He didnt see the film because he had seen it.
他没看那部电影，由于他已经看过了。
They couldnt get on the train，for it was too crowed.
比较：because, since, as和for
1) because语势最强，用来讲明人所不知是什么原因，回答why提出的问题。当缘由是显而易见的或已为大家所知，就用as或 since。
I didnt go, because I was afraid.
Since /As the weather is so bad, we have to delay our journey.
2) 由because引导的从句假如放在句末，且前面有逗号，则可以用for来代替。但假如不是说明直接缘由，而是多种状况加以判断，就只可以用for。
He is absent today, because / for he is ill.
He must be ill, for he is absent today.
注意
because不可以和so 连用。
4. 目的状语从句
引导连词有 that， so that，in order that。
He must get up early so that he can catch the first bus.
他需要早起，以便能赶上第一辆公共汽车。
He repainted the house so that he could welcome the guests.
Millions of trees are planted in North China so that the sand can be sTOPped from moving south.
The mother left work earlier in order that she could be at home when the children arrived.
So that 以便/以致
比如：They studied hard so that they could pass the exam.
They started early so that they caught the early bus.
注意点：
在例句中,是引导目的状语;在例句中，是引导结果状语。一般来讲，从句中含有情态动词的，为目的状语。无情态动词的，为结果状语。
5.结果状语从句
引导连词有that，sothat，such.that
The box is so heavy that I cant lift it.
这个盒子这样沉，以致我没办法抬起来。
such+名词性词组+that
So+形容词/副词+that这样以致
比如：She is such a good teacher that we all love her.
It was such a hot day that they didnt go out for a walk as usual.
注意点：
1.such+a+形容词+名词+that，可以改写成：so+形容词+a+名词+that，例句可以改写成：She is so good a teacher that we all love her.
2.在such+形容词+名词 或不可数名词+that结构中，形容词若是many/few或much/little时，用so不需要such，即：so+many/few+可数名词复数+that，so+much/little+不可数名词+that
There are so many people in the room that I cant get in.
The man has so much money that he can buy a car.
6.让步状语从句
引导连词有though，although; even though/if; whatever; however
Although he is young，he knows a lot of things.
虽然他年龄小，但却认识很多事物。
Even though you dont like him, you still have to be polite.
Whatever you say, I will not change my mind.
注意
although，though不可以和but连用。
7.比较状语从句以than为引导连词。容易见到连词as.., than; the, the
Jim is older than Lucy.
吉姆比路希年长。
Skiing is more exciting than running.
The more you practice, the more knowledge you will get.
注意
than 引导的比较状语从句中的谓语常省略。
8.条件状语从句以if, unless为引导连词。
If you eat bad food，you may be ill.
假如你吃到坏了的食物，就会生病。
If it doesnt rain tomorrow, we will have a sports meet.
注意
主句是以后时，从句用一般目前时。
状语从句中容易见到的误点
1) 时间状语从句和条件状语从句中的时态与主句的搭配：
2) 缘由状语从句because与because of ;
Because+从句和because of +n./ pron
比如：I was late because I didnt catch the bus.
I was late because of the rain.
