because=因为
since=既然
due to=由于
应该是这样吧
Jayrein 发表于 2012-5-8 11:01 PM 
totally agree...
normally "because" is used in the middle of the sentence, and "since" is often used at the start of a sentence, and "due to" is quite similiar to because just depends on how u use it ba haha..