因为…所以… because … so …
6 phrasesHD
因为下雨，所以没去
ENit rained, so I didn't go
HD
因为很忙，所以没时间
ENI'm busy, so I've no time
HD
因为便宜，所以买了
ENit was cheap, so I bought it
HD
为什么？
ENwhy?
HD
因为太累了
ENbecause I'm too tired
HD
所以我不去
ENso I'm not going
因为…所以… keeps both halves, which English would call redundant - "because it rained, therefore I didn't go". Chinese pairs conjunctions like this routinely, and dropping one is allowed but keeping both is the safe default while you are learning.