沪版英语because的用法详解(含练习)

连词because用法详解
1. 表示原因，语气较强，可用来回答 why 提出的问题。如：
A：Why do you love her? 你为什么爱她?
B：Because she is kind. 因为很善良。
2. 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。
3. 汉语说“因为……所以……”，但英语却不能用 because…so…这样的结构。如：
因为我病了半年，所以把工作丢了。
误：Because I was ill for six months, so I lost my job.
正：Because I was ill for six months, I lost my job.
正：I was ill for six months, so I lost my job.
4. 汉语说“之所以……是因为……”，英语可以类似以下这样的句型（用that比用 because普通）。如：
The reason (why) I’m late is that [because] I missed the bus.
我迟到的原因是因为我没有赶上公共汽车。
传统语法认为这类句型不能用 because, 但在现代英语中用because 的情形已很普遍。
5. 在not…because…这一结构中，not 有时否定主句，有时否定从句，具体视语境而定。一般说来，若 not
否定主句，最好在because 之前用逗号，否则会引起歧义，如下句在没有特定上下文时就有两种解释：
I didn’t go because I was afraid.
这个句子既可理解为“我没有去是因为怕”，也可理解为“我不是因为怕才去”。但是，如果because
之前有副词just修饰，一般认为not是否定从句而不是主句。如：
You shouldn’t get angry just because some people speak ill of you. 你不要因为有人说你坏话而生气。
6. 有时可引导一个句子作主语，此时通常采用just because这样的形式，并且主句谓语动词通常（当然不是
一定）为mean。如：
Just because you speak English doesn’t mean you can teach it. 你会说英语并不意味着你能教英语。
Just because you’re old doesn’t mean you have to be idle.
只是因为你年纪大了，这并不意味着你就应该懒散不活动。
Because you have words with your wife is no reason to smash up things.
你和你的妻子吵架并不能成为摔东西的理由。
7. 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。
He left the company because of what the boss said at the meeting.
他离开了这家公司，是因为老板在会上讲的话。
8. because of通常用来引导状语，而用于不引导表语（引导表语时可用 due to）。如：
误：

His absence is because of the rain.
正：His absence is due to the rain. 他因雨未来。
但是，若主语是代词（不是名词），则它引出的短语也可用作表语。如：
It is because of hard work. 那是因为辛苦工作的原因。
It will be because of money. 那将都是因为钱的原因。
because, since, as, for的用法区别
四者均可用来表示原因，区别如下：
(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。”
My stomach hurts because I have eaten too many apples. 我肚子痛，因为苹果吃得太多。
It is because he is honest that I like him. 是因为他诚实我才喜欢他。
(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。
b. 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
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)
初中英语每日训练之十一
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。
He shut the window with such force that the glass broke. 他关窗子用力很大, 结果玻璃震破了。
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。
Seeing that he’s ill he’s unlikely to come. 因为他病了，他大概不会来了。
Now that she has apologized, I am co

ntent. 既然她已经道了歉, 我也就满意了。
如何理解in that引导从句的用法
1、如果是作为自由搭配in that，那么它的意思需视上下文而定。如：
Put the bookcase in that corner. 把书柜放在那个角落里。
You ought on no account to take part in that. 你千万别参与那事。
It is expensive to stay in that hotel. 住那家旅馆很贵。
2、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。
I’m in a slightly awkward position, in that he’s not arriving until the 10th.
我的处境有点难堪，因为他要10号才来。
连词专项练习
( ) 1. ________ it was early, she turned off the radio and went to bed.
A. Because B. Though C. Since D. As
( ) 2. Which shirt is more expensive, the white one ________ the green one?
A. and B. or C. but D. so
( ) 3. Work hard, ________ you’ll learn English well.
A. and B. but C. for D. or
( ) 4. You may go ________ you clean the classroom.
A. before B. because C. as soon as D. after
( ) 5. He is a teacher ________ I am a farmer.
A. or B. so C. but D. while
( ) 6. I like autumn ________ I can have a lot of fruit.
A. but B. if C. though D. because
( ) 7. ________ Jim ________ Kate has come. I don’t know when they will come.
A. Both…and B. Not only….but also C. Neither….nor D. either…or
( ) 8. He’s at home these days. You may come ________ today ________ tomorrow.
A. either…or B. both….and C. not only…but also D. neither…nor
( ) 9. My grandma is old ________ strong.
A. and B. or C. but D. so
( ) 10. The boy is clever, ________, he often makes mistakes.
A. and B. however C. when D. or
( ) 11. You’d better put on more clothes, ________ it’s very cold outside.
A. for B. and C. because of D. or
( ) 12. ________ I went into the classroom,, the students were talking about the film.
A. While B. After C. When D. Before
( ) 13. We’ll go back to the fields ________ the snow stops.
A. as soon as B. because C. but D. and
( ) 14. The plane flew so high ________ it looked very small.
A. that B. why C. whether D. /
( ) 15. I didn’t get up ________ Father came back from the factory.
A. when

B. until C. while D. because
( ) 16. I don’t know ________ or not we’ll have an exam tomorrow.
A. if B. when C. whether D. that if
( ) 17. Please speak loudly ________ I can hear a little better.
A. though B. so that C. that D. while
( ) 18. Please speak loudly ________ I can hear a little better.
A. though B. so that C. such that D. as
( ) 19. Ring me up ________ you come to my house.
A. though B. as C. before D. than
( ) 20. More people came ________ I expected.
A. as if B. so that C. since D. than
( ) 21. You must do ________ I told you.
A. after B. before C. where D. as
( ) 22. Class One is ________ large ________ Class Two.
A. so, that B. as, as C. such, that D. so, as
( ) 23. They will be thankful for ________ you have done.
A. what B. that C. which D. who
( ) 24. I will write to you ________ I get there.
A. while B. as soon as C. as D. since
( ) 25. ________ he is old, he can walk very fast.
A. If B. Although C. Since D. Because
( ) 26. We’ll go to visit the Great Wall ________ it rains tomorrow.
A. since B. as soon as C. when D. unless
( ) 27. You most get up early tomorrow, ________ I will go there alone.
A. or B. and C. yet D. for
( ) 28. It was raining hard, ________, the peasant went on with their work.
A. but B. and C. however D. although
( ) 29. Do you know ________ Jane is getting on well with her classmates?
A. what B. how C. that D. which
( ) 30. He is not a football player ________.
A. but also plays the piano B. but the pianist
C. but play the piano as well D. but a famous pianist