1.although較正式,語氣強
Although he was tired,he went on working.

2.although引導的從句放在主句前后均可,有時還可放在句中.
Although many difficulties are still ahead,we are determined to make greater achievements.盡管在前面的道路上還有許多困難,但是,我們決心要取得更大的成就.
He often helps me with my English although he is quite busy.盡管他相當忙,但是還常常幫我學英語.
3.although引導的從句不能與but,however連用,但可與yet,still連用.不能說：Although he was old,but he worked hard.應把but去掉.當然,保留but而去Although也可.
注意:although 的幾不:
although不能指假設的情況
although不能作并列連詞
although不能作副詞,放在詞尾