although的基本意思是“尽管,虽然”或“然而,但是”；although与though在意义上相似，但文体上是比较正式用词，语气比though强。1.though可以做副词，指“但是”，但是although不行。as though属固定搭配，though不能替换成although。although要比though来得更正式，相对而言，语气比较重，但是though的使用更普遍。2.although引导的从句，常指实际发生的事情，而不是假象，设想。though和although都可在从句中用作连词，通常表示相同的意思，但though更普遍适应于非正式的表述中。He said he would come, he didnt, though. 句中的though不能替换成although。He would not be unhappy though he should have to live alone. 就算要一个人住，他可能也不会不开心。He was not unhappy although he had to live alone. 虽然他不得不要一个人住，却没有不