What's the structure for 'Have you ever + verb?' in Vietnamese?

subject + (đã) bao giờ + verb + chưa? // subject + (đã) + verb + bao giờ chưa?

How to say 'yes' to the question: 'Have you ever....?' in Vietnamese?

How to say 'no' to the question: "Have you ever..." in Vietnamese?

Translate this sentence to Vietnamese: "Have you ever been to South Africa?"

Say 'no' to this question: "Bạn đi Nam Phi bao giờ chưa?"

Chưa, mình chưa bao giờ đi Nam Phi.

Không, mình không bao giờ đi Nam Phi.