We use the Present Perfect to talk about experiences we've had in our life without specifying the exact time.
It's easy for me to follow this rule when I want just to state that I've done something in my life. However, it becomes confusing if I want to go into detail after stating the fact. If I want to tell a story about something that has happened to me, should I use the Past Simple after the Present Perfect?
A couple of confusing examples I can think of:
I’ve heard other foreigners speak English whose accent was(?) much thicker than mine.
I've met a Japanese man once, we were(?) at a conference together.
Are these correct or not? I will appreciate it if you give me more relevant examples.