although引導讓步狀語從句,可以根據時間狀語確定時態,例如:
1、The two pictures are similar, although not identical.這兩幅畫很相似,雖然不完全相同。
2、I like her, although I could cheerfully throttle her at times.我喜歡她,雖然有時煩得真想把她掐死。