3.原因状语从句
1. because(语气比较强，比较正式场合)/for/since/as
He's absent because he's ill
The day breaks, for( 表示推测, 并非因为鸟唱歌天就亮) the birds are singing.
Since you are ill, I'll go alone
As it is snowing, we shall not go to the park.
1.1 because
He's absent because he's ill // 肯定句中没有逗号隔开
She didn't marry you (not) because you had money. // 否定的是because后的内容 嫁给你不是因为你有钱
She didn't marry you, because you had money. // 不嫁给你，是因为你太有钱
在否定句中，逗号的分割作用，以免产生歧义
常用来回答why, 一个未知的原因
I didn't go to see him,for a heavy snow was falling. // for是一般是补充说明 只能放在逗号后面 隔开后置 不是直接原因，补充说明
The day breaks, for the birds are singing// 不表示原因，只是一种推断。 区别 原因和 推断
As/Since 后面节点是明显的事实 because没人告知则不知道
as = since +事实 彼此知道的 看的见的事实
As(由于,语气弱) it is raining, we'd better stay at home
Since(既然) you've finished your homework, you can watch Tv now.
Seeing that /considering that(鉴于) the weather is bad, we'll stay at home
Now that(既然) is has stopped raing, let's start at once.
Not that(不是) i don't like the film, but that i hove no time for it // 不是....... 而是
I like the city in that i have more friends here. //in that某方面的原因 because 是唯一的原因
因为 既然 鉴于
because
for since seeing that
as now that considering that
in that
2. 目的
He gets very early so that/in ordor that he can catch the first bus.
Shut the window for fear that it may rain.生怕
Take your umbrella in case it rains. 以防
She walked int the room quietly lest she should wake up her baby.// lest +should do(固定) 为了不
3结果
It is such a heavy box that nobody could move it.
it is so heavy a box that nobody could move it.
The box is so heavy that nobody could move it.
so/such ......that
I made a big mistake, so that I lost of money.
所以 = so 不同于目的状语从句 是的 以便 必须逗号隔开
such as // 缺成分
it is such an important part of our society that it has influenced our language.
4.方式状语从句
I have changed it just as you suggested // 正如
he watched her as a act watches a rat // 就像
she's doing her work the way i like it done // 以......方式
she stood at the door as if/though she was waiting for someone // 猜测 好像
he acts as if /though she didn't exist // 虚拟 好像