1、Jack has already finished the work.
Jack went to bed after (he had finished the work).
杰克写完作业之后去睡觉.
2、They have walked for a long time.
They felt tired and thirsty after (they had walked for a long time).
他们走了很长时间之后感到累了.
1、Jack has already finished the work.
Jack went to bed after (he had finished the work).
杰克写完作业之后去睡觉.
2、They have walked for a long time.
They felt tired and thirsty after (they had walked for a long time).
他们走了很长时间之后感到累了.