1．因为用英语的写法是：because。
2．例句：
He is called Mitch, because his name is Mitchell.他被叫做米奇，因为他的名字是米切尔。
They are here because of us. 他们是因为我们来这里的。
I was angry because I played so badly. 我生气因为我弹得这么糟。
