Student or Learner
"He is sorry for what happened."
In the above sentence, can "for" be dropped?
You can say he is sorry FOR something.
You can say he is sorry ABOUT something.
You cannot say that he is sorry something.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.