“力”刻行动 搞定英语
(三)、引导目的状语从句的从属连词。
主要的有 in order that, so that, in case, for fear等。如：
He raised his voice so that everyone could hear. 他提高了嗓音，以便每个人都能听见。
Take your umbrella (just) in case it rains.
带上雨伞，以防下雨。
in case用作连词的用法
in case用作连词时有以下两个用法：
1. 表示条件，意为“如果”“万一”。如：
In case it rains, do not expect me. 如果下雨，就不要等我了。
2. 表示目的，意为“以防”“生怕”。如：
I’m shy of buying shares in case I lose money. 我不敢买股票，怕赔钱。
Take warm clothes in case the weather is cold. 带些暖和的衣服，以防天气变冷。
【注：】有时中间的谓语由 should构成，强调偶然性，可译为“万一”：
I wrote down her address in case I should forget it. 我写下了她的地址，以防万一我忘了。
I always slept by the phone in case he should ring during the night.
我总是睡在电话机旁边，怕万一他夜间打电话来。
(四)、引导结果状语从句的从属连词。
主要的有so that, so…that, such…that等。如：
I went to the lecture early so that I got a good seat. 我去听演讲去得很早, 所以找个好座位。
I had so many falls that I was black and blue all over.
我摔了许多跤，以致于全身都是青一块紫一块的。
(五)、引导原因状语从句的从属连词，
主要的有because, as, since, seeing (that), now (that), considering (that) 等。如：
He distrusted me because I was new. 他不信任我，因为我是新来的。
As you are sorry，I’ll forgive you. 既然你悔悟了，我就原谅你。
Since we’ve no money, we can’t buy it. 由于我们没钱，我们无法购买它。
1. because 除经常用于引导原因状语从句外，还可引出表语从句或用于强调句等。如：
It is because you’re eating too much. 那是因为你吃得太多了。
It was because I wanted to buy a dictionary that I went to town yesterday.
我昨天是由于想买本字典而进城的。
2、用于构成复合介词because of，其后可接名词、代词、动名词、what 从句（但不能是that从句或没有引导词的从句）等。如：
He is here because of you (that). 他为你（那事）而来这里。
We said nothing about it, because of his wife’s being there. 因为他妻子在那儿，我们对此只字未提。
because, since, as, for，用法区别
(1) 关于 because：语气最强，表示直接原因，可用于回答 why 提出的问题、引导表语从句、用于强调句等，而其余三者均不行：
“Why didn’t he come?” “Because he was ill.” “他为什么没来?”“因为他病了。”
because, since, as, for，用法区别
(2) 关于 since 与 as：
a. 两者所表示的原因都是人们已知的，即对已知事实提供理由，而不是表示直接原因。since 比 as 语气稍强，且比 as 略为正式，它们引导的从句通常放在主句之前，有时也放在主句之后：
As you weren’t there, I left a message. 由于你不在那儿，我留了个口信。
Since you are wrong, you should apologize. 你既然错了，就应该道歉。
because, since, as, for，用法区别
since 可用于省略句，而其他三者不行：
Since so, I have nothing to say. 既然如此，我无话可说。
(3) 关于 for：是并列连词
(其余三者为从属连词)，它有时可表示因果关系(通常要放在主句之后，且可与
because 换用)；有时不表示因果关系，而是对前面分句内容的解释或推断(也要放在主句之后，但不能
because, since, as, for，用法区别
与because 换用)。比较：
The ground is wet, for (=because) it rained last night. 地面是湿的，因为昨晚下过雨。
It must have rained last night, for the ground is wet this morning.
昨晚一定下过雨，你看今天早上地面是湿的。 (此句不能用 because 代 for)
如何理解in that引导从句的用法
如果用in that引导从句，则它是一个习语，意思是“因为”“由于”，与从属连词because意思相同。如：
She was fortunate in that she had friends to help her. 她很幸运，有一些朋友帮助她。
The situation is rather complicated in that we have two managing directors.
由于我们有两位总经理，所以情况很复杂。
(六)、引导让步状语从句的从属连词。
主要的有although, though, even though, even if, while, however, whatever, whoever, whenever, wherever等。如：
I like her even though she can be annoying. 尽管她有时很恼人, 但我还是喜欢她。
You won’t move that stone, however strong you are. 不管你力气多大, 也休想搬动那块石头。
Whatever we have achieved, we owe to your support. 我们取得的一切成就都归功于你们的支持。
although 与 though 用法区别与说明
1. 用作连词，表示“虽然”，两者大致同义，可换用，只是 although 比 though 更为正式。如：
Though [Although] they’re expensive, people buy them.虽然它们很昂贵，人们还是买。
2. although 一般不用作副词，而 though 可用作副词，表示“可是”“不过”。如：
I expect you’re right—I’ll ask him, though. 我认为你说得对——我去问问他也好。
这样用的though通常位于句末，但有时位于句首的though也有这样的意思。如：
although 与 though 用法区别与说明
2、在 as though（好像，仿佛），even though（即使，纵然）等固定短语中，不能用 although代替though。
如：She treats me as though I were a stranger. 她待我仿佛我是一个陌生人。
He’s the best teacher even though he has the least experience. 他尽管经验最少，但教得最好。
although 与 though 用法区别与说明
3. 当though用于倒装形式，它不能换成although，但可换成as。
Successful though [as] he is, he is not proud. 他虽然成功，但不骄傲。
Much though [as] I like you, I couldn’t live with you. 我尽管很喜欢你, 却不能和你在一起生活。
【注意：】值得一提的是，在某些特定的语境中，although 与 but 连用的句子是可能的
【注：】
but 引出的句子在 although 从句之前。
如：
He wanted to go abroad, but although he had some money he couldn’t afford it.