because意思是因为，对应的词义应该是所以so。但是和汉语不同，值得注意的是，这两个词，不能同时用于一个语境的两个句子的句首，只能用一个。比如说，because，he didn't get up on time，he missed the first class。或者说He didn't get up on time，so he missed the first class。