Gerund or Participle
Could you tell me please whether the words in parentheses are gerunds or participles?
Or they might be both participles and gerunds? I think they might be both.
I’m busy (refurnishing) my room, don’t call me this weekend.
It’s no use (crying) over spilt milk.
It’s no good (calling) him, he’s abroad.
I had trouble (starting) my car this morning.
I had a hard time (understanding) what he was saying.
Geoffrey spent the whole weekend (working) in the garden.
I don’t want to feel that I wasted my youth (being) good and responsible when I should have been bad and rebellious.