A: Have you ever seen a shark? (present perfect)
B: No, I haven’t. But last year I swam with dolphins on holiday. (past simple)
A: How long have Ruth had stomach ache? (present perfect)
B: It started yesterday. She didn’t eat anything since then. (past simple)
A: We went to a Japanese restaurant last weekend. (past simple)
B: Really? I have never tried Japanese foo. What’s it like? (present perf)
A: James ans Tom went over 20 minutes late this morning. (past simple)
B: Have they ever arrived at school on time? They’re always late! (present perf)