Looking up...
because
/bɪˈkɔz/
因为
I stayed home because it was raining.
因为下雨，我待在家里。
一般
表示原因或理由
She left early because she was tired.
她因为累所以早退了。
He didn't come because he was busy.
他没来是因为他很忙。
用于回答why的问题或引导原因从句。
搭配
because of由于just because仅仅因为
专业提示
区分because和because of
because后接完整句子（从句），because of后接名词或名词短语。例如：'I stayed because it rained'（从句）vs 'I stayed because of the rain'（名词短语）。
词源
Middle English: from by cause, from Old English bi cause 'by cause'.
用法说明
在口语中，有时会省略主语和be动词，如'Because tired'（因为累了）。但正式写作中应避免。
英汉词典