So basically... Without any context, impossible to find out whether it is past or present?
Yes, it's impossible. At least for הוא and היא.
True, but the tones in this audio indicate that it is a question, meaning that someone asks wether a third person is about to come
The tone could imply both "did he come" or "is he coming"
Its really hard to tell
Or if he came
I just realized i can't tell if this is past or present. Is he coming or did he come