1) He might have forgotten to check in.
他可能忘了报到
2) He has most likely forgotten.
他很可能忘了。
3) but he was feeling tired,
可他感到累了，
4) Mind you don't forget it.; Be sure to remember it.
可别忘了。
5) He may have gone.
他可能走了。
6) He neglected to return the book.
他忘了还书。
参考词条