because

conj.

1. 因为
   for the reason that
   1. I did it because he told me to.
      是他吩咐我才做的。
   2. Just because I don't complain, people think I'm satisfied.
      就因为我不发牢骚，大家便以为我满意了。

1. CONJ-SUBORD （说明原因）因为，由于
   You use because when stating the reason for something.
   1. He is called Mitch, because his name is Mitchell...
      人们叫他米奇，因为他大名叫米切尔。
   2. Because it is an area of outstanding natural beauty, you can't build on it...
      考虑到这一带自然风光旖旎，你不能建在这里。
   3. Women are doing the job well. This is partly because women are increasingly moving into a man's world...
      女性工作出色，部分原因在于她们越来越多地涉足男性的领域。
   4. 'Why didn't you tell me, Archie?'— 'Because you might have casually mentioned it to somebody else.'
      “你怎么没告诉我呀，阿奇？”——“因为你可能会一不小心说了出去。”
2. CONJ-SUBORD （作出解释）因为
   You use because when stating the explanation for a statement you have just made.
   1. Maybe they just didn't want to ask too many questions, because they rented us a room without even asking to see our papers...
      也许他们只是懒得问太多的问题，因为他们都没要求看我们的证件就把一个房间租给我们了。
   2. The President has played a shrewd diplomatic game because from the outset he called for direct talks with the United States...
      总统玩了一场高明的外交游戏，因为从一开始他就要求和美国直接对话。
   3. I had a sense of déjà-vu because I could recognise everything in London.
      我有一种似曾相识的感觉，因为我能认出伦敦的一切。
3. PREP-PHRASE 因为；由于
   If an event or situation occurs because of something, that thing is the reason or cause.
   1. Many families break up because of a lack of money...
      许多家庭由于缺钱而破裂。
   2. Because of the law in Ireland, we had to work out a way of getting her over to Britain.
      由于爱尔兰的法律所限，我们不得不想办法把她弄到英国去。
4. PHR-CONJ-SUBORD 仅仅因为
   You use just because when you want to say that a particular situation should not necessarily make you come to a particular conclusion.
   1. Just because it has a good tune does not mean it is great music...
      仅凭旋律优美并不见得就是一首杰出的音乐作品。
   2. Just because something has always been done a certain way does not make it right.
      仅仅因为老是以某种方式做事并不意味着这么做就是对的。

You can use because, as, since, or for to give an explanation for something. Because is the commonest of these, and is used when answering a question beginning with 'why?'.You can use as or since instead of because to introduce a clause containing a reason for something, especially in writing. ...a note about The National Portrait Gallery, as the word 'Gallery' can be misleading... Since the juice is quite strong, you should always dilute it. In stories, for is sometimes used to explain or justify something. He seemed to be in need of company, for he suddenly went back into the house. Note that because is a conjunction, and is used to link two ideas within one sentence. I'm unsocial, because of my deafness.
because, as, since 或者 for 都可以用来给出解释。because 最常用，用来回答以 why 开头的疑问句。as 或 since 可以代替 because 引导原因从句，尤其是在书面语中：a note about The National Portrait Gallery, as the word ‘Gallery’ can be misleading（对 The National Portrait Gallery 的注释，因为 Gallery 一词容易令人误解），Since the juice is quite strong, you should always dilute it（这种果汁太浓，所以必须加以稀释）。在故事中，for有时用于解释或论证：He seemed to be in need of company, for he suddenly went back into the house（他看起来需要陪伴，因为他突然回到了屋里）。注意，because 是连词，用来连接一个句子中的两个观点：I'm unsocial, because of my deafness（我耳朵聋，所以不善交际）。

1. He is called Mitch, because his name is Mitchell
   人们叫他米奇，因为他大名叫米切尔。
2. Because it is an area of outstanding natural beauty, you can't build on it
   考虑到这一带自然风光旖旎，你不能建在这里。
3. Women are doing the job well. This is partly because women are increasingly moving into a man's world
   女性工作出色，部分原因在于她们越来越多地涉足男性的领域。
4. 'Why didn't you tell me, Archie?' — 'Because you might have casually mentioned it to somebody else.'
   “你怎么没告诉我呀，阿奇？”——“因为你可能会一不小心说了出去。”
5. Maybe they just didn't want to ask too many questions, because they rented us a room without even asking to see our papers
   也许他们只是懒得问太多的问题，因为他们都没要求看我们的证件就把一个房间租给我们了。
6. The President has played a shrewd diplomatic game because from the outset he called for direct talks with the United States
   总统玩了一场高明的外交游戏，因为从一开始他就要求和美国直接对话。
7. I had a sense of d é j à-vu because I could recognise everything in London.
   我有一种似曾相识的感觉，因为我能认出伦敦的一切。
8. Many families break up because of a lack of money
   许多家庭由于缺钱而破裂。
9. Because of the law in Ireland, we had to work out a way of getting her over to Britain.
   由于爱尔兰的法律所限，我们不得不想办法把她弄到英国去。
10. Just because it has a good tune does not mean it is great music
    仅凭旋律优美并不见得就是一首杰出的音乐作品。
11. Just because something has always been done a certain way does not make it right.
    仅仅因为老是以某种方式做事并不意味着这么做就是对的。
12. I denied my father because I wanted to become someone else.
    我和父亲断绝了关系，因为我想成为一个不一样的自己。
13. I don't get lonely now because I make the effort to see people.
    我现在不觉得孤独了，因为我尝试着与人交往。
14. Sometimes I improvise and change the words because I forget them
    有时，我临场发挥改了词，因为我把原来的词给忘了。
15. I'm guessing again now because I'm not hooked into the political circles
    我现在又是在猜测了，因为我没有涉足政界。
16. I thought they were laughing at me because I was ugly
    我觉得他们嘲笑我是因为我长得丑。
17. You're just mad at me because I don't want to go
    因为我不想去，你就对我火冒三丈。
18. I didn't give my name because if I did I thought you might not have come.
    我没有留下我的名字，因为如果我这么做的话，我想你可能就不会来了。
19. I have not worried so much this year, partly because I have had other things to think about
    今年我不太担心，在某种程度上是因为我有别的事情要考虑。
20. I became a teacher because I preferred books and people to politics
    我当了老师，因为我更喜欢书本和人而不是权术。
21. I suppose people do it because there is that element of danger and risk
    我想人们这样做是因为其中存在危险和风险的因素。
22. There's no chance that he'll surface because he's bound to have heard by now
    他不会再出现了，因为他现在肯定听说了。
23. They actually moved down from upstairs because the rent's that expensive.
    他们确实从楼上搬到了楼下，因为房租太贵了。
24. I want this baby very much, because it certainly will be the last.
    我很爱这个小宝贝，因为它肯定是我最后一个孩子了。
25. It is mainly because of my fault.
    这主要是由于我的过错。
26. You need not flare up merely because I mentioned your work.
    你大可不必因为我提到你的工作就动怒。
27. I did it because they asked me to do it!
    我做这事是因为他们请我做啊！
28. The game was postponed because of rain.
    因雨，比赛延期了。
29. It's not fair to hold me up to ridicule because I can't spell!
    因为我拼不出来就讥笑我，这是不公平的。
30. They bumped him off because he knew too much about their illegal activities.
    他们把他谋杀了，因为他对他们的非法活动知道得太多了。

  because as for since【导航词义：因为，由于】

  because conj. 因为

〔辨析〕语气最强，表示因果关系，通常用来回答由 why 引导的疑问句。由 because 引导的分句置于句首时，须用逗号与主句隔开，置于句末时则不用隔开。

  as conj. 因为，由于

〔辨析〕如果所述理由是明显的或者已知的，则用 as 较 because 更为合适。

  for conj. 〈正式〉因为

〔辨析〕for 属于并列连词，由它引导的分句表示补充说明性的理由，通常只能置于句末，且必须用逗号与前面的分句隔开。

  since conj. 因为，既然

〔辨析〕当所述原因是已知的客观事实或被当作推断的理由时用 since，语气略强于 as。