因为…所以…
Because…, therefore…
HSK 2HSK 3.0 · 2
因为 + cause，所以 + result
This pair works like 'because…, so…': the first clause gives the cause, the second the result. Either word may be used alone (我很累，所以想早点儿睡). To give the result first, put the 因为 clause second: 我没去，因为下雨了 — then 所以 is not used. 因为 can come before or after the subject of its clause. A common error is pairing 因为 with 但是 or mixing it up with 虽然…但是….
HSK 2–3 gap fills and listening questions asking 为什么.
Examples
因为下大雨，所以我们没去爬山。
Because it rained heavily, we didn't go hiking.
因为他生病了，所以今天没来上课。
He's sick, so he didn't come to class today.
我很累，所以想早点儿睡觉。
I'm tired, so I want to go to bed early.
我喜欢这家饭馆，因为这里的菜又好吃又便宜。
I like this restaurant because the food is tasty and cheap.
Exercises
1. 路上堵车，所以我来晚了。
2.因为今天是周末， 商店里人很多。
3.我没买那件衣服， 太贵了。
4.他每天练习说汉语， 他的口语很好。