2) Len is
playing tennis. He's not very good and he doesn't know the rules.
You ask: Have you played tennis before?
He says: No, this is the first time I`ve played tennis.
3) Sue is riding a horse. She doesn't look very confident or comfortable.
You ask: Have you ridden a horse before?
She says: No, this is the first time I`ve ridden a horse.
4) Maria is in London. She has just arrived and it's very new for her.
You ask: Have you been in London before?
She says: No, this is the first time I`ve come (arrived) to London.