例句：
1.I did it because they asked me to do it!
我做这事是因为他们请我做啊！
2.Jack duked me because he said I had insulted him. partly because 部分原因是
杰克用拳猛击我，因为他说我侮辱了他。
3.The electricity wastes because they often forget to turn it off.
因为他们常常忘记关电源，所以费电。
4.I can't do it now because I am busy.
因为我正忙着，现在不能做此事。
5.The dog was panting because of the hot weather.
因为天热这只狗不停地喘气。