连词 和介词的用法连词 and, but, because ,although, so . 介词in at on und

He is a student ,and his mother is a doctor.
He has a bike,but he doesn't use it often.
He is late ,because he missed the bus.
Although he is disabled,he makes great success.
There is no bread left,so I have to buy one in the store.
介词放在名词性的词语（名词、动名词、代词）之前就行了,
其中 in on at upon 等后面接表示地点的词表示方位
也可以接人、物,表示对做的对象
复合介词 in order to,so as to as well as 的用法较多,但是一般比较固定,容易记忆