一、sorry
adj.遗憾的;对不起的;无价值的，低等的;感到伤心的
1、Sorry we have not met you in time.
难过的我们没有及时遇见你。
2、If you should miss the chance, you would feel sorry for it.
如果你错过了这次机会，你会难过的。
二、grieved
v.感到悲痛，伤心( grieve的过去式和过去分词 );使…伤心;惨恻;酸楚
If let me share responsibility together please you are grieved.
如果你是难过的`，请让我一起分担。
三、sad
adj.悲哀的;可悲的;糟糕的;令人遗憾的
We are very sad to hear that you are leaving.
听说你要走了，我们十分难过。
四、upset
adj.沮丧的;难过的;失望的;（肠胃）不舒服的
After she died I felt very, very upset...
她去世之后，我非常非常难过。
五、unhappy
adj.不快乐的;不幸的，悲惨的;不恰当的;不凑巧的，难过的
He was unhappy at being left out of the team.
他对未能入选该队感到难过。