although 连词，尽管，虽然
Although he worked hard, he still failed the exam.
【辨析】
although 尽管,让步状语从句中,可放在句首或句中,不能在句末,不与but连用.
though 尽管,可以放在句末,不与but 连用.
【拓展】
其他可以表示尽管,即使的短语:
as 尽管
even if= even though 即使
in spite of 尽管
despite 尽管,虽然，不顾
regardless of 不管不顾
while 尽管
【小试牛刀】
________ jeans were ever invented 100years ago，they are still in fashion today.
A. Because B. If C. Although D. Since
解析:选C
