because

1、by + cause.

because 因为

前缀be-, 强调。cause, 原因。

because

because: [14] Because originated in the phrase by cause, which was directly modelled on French par cause. At first it was always followed by of or by a subordinate clause introduced by that or why: ‘The Holy Ghost was not yet given; because that Jesus was not yet glorified’, St John’s Gospel, 7:39, 1611. But already by the end of the 14th century that and why were beginning to be omitted, leaving because to function as a conjunction, a move which would perhaps have exercised contemporary linguistic purists as much as ‘The reason is because …’ does today. The abbreviated form ’cause first appears in print in the 16th century.
=> cause

because (conj.)

c. 1300, bi cause "by cause," modeled on French par cause. Originally a phrase, often followed by a subordinate clause introduced by that or why. One word from c. 1400. As an adverb from late 14c. Clipped form cause attested in writing by mid-15c.

1. She feels devalued because she knows her husband has had affairs.

她觉得自己掉价了，因为她知道丈夫有了外遇。

2. 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。

3. I get very nervous because I'm using a lot of expensive equipment.

因为正在使用很多昂贵的设备，所以我非常紧张。

4. Because you're not burning calories, everything you eat turns to fat.

由于没有消耗卡路里，你吃的所有东西都会变成脂肪。

5. He was not a particularly good shot because of his eyesight.

他视力不好，算不上是一个出色的射手。

【as, because, for, since】
这些连词均含有“因为”之意。
as: 从属连词，语意较because, since弱，着重在主句，所表示的原因或理由是“附带的”。
because: 从属连词，语意强，着重直接的原因或理由，所引出的从句是全句的重心，用以回答why提出的问题。
for: 并列连词，语气较弱，所引出的句子一般放在后面，表示附带说明的理由或推断理由。
since: 语意比because弱，但比as强，一般用于表示“由于大家已知的事实”。

【because, because of】
because: 连词，连接两句话，
because of: 介词短语，后接词或短语 He didn't go to school because of his illness.