yīn
yīn
wèi
wèi
suó
suǒ
yǐ
yǐ
1
because… thus…
2
on account of…then…
因为我生病了,所以不能上班。
Because I'm sick, I can't go to work.
因为他忘了她的生日,所以她那么生气。
Because he forgot her birthday, she's that angry.
因为他在美国读书,所以英文这么好。
Because he is studying in America, so his English is this good.
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