(1)介词:
(a) Please come to my house after dinner.晚饭后
(b) He ran after the bus.追赶
(c) His mother waited for him night after night.（一个）接着（一个）
(d) It's sad to fail after all that work.由于
(e) They are still friends after all their differences.
(2) 副词:
(a) three hours after; (b) departed shortly after; (c) after all I don't really know him.终究
(d) He told me afterwards that he had not enjoyed the film.后来
(3)连词:
(a) I saw them after I arrived.后来
(b) They arrived soon after.后来
(c) tomorrow,or the day after...
(4) 名词:
(a) afternoon午后; (b) afterthought事后的想法; (c) aftermath后果