Although he got up early this morning,but he didn't catch the early bus.这句话哪里错了

问题描述:

Although he got up early this morning,but he didn't catch the early bus.这句话哪里错了

英语中一句话只能用一个连词,而althongh和but在这里都是连词,所以随便去掉一个连词就对了.
还有英语中一句话有两个分句时,一定要有一个(只能是一个)连词