1. They haven't flown on the plane before. (Present perfect)
2. He has never played tennis before. (Present perfect)
3. I haven't seen Daniel for five years. (Present perfect)
4. We haven't been to Mexico before. (Present perfect)
5. The film already started when you had come to the cinema. (Present simple/Present continuous)
*Present perfect: S+has/have ( Tùy vào subject) + V3/ed+ (Since/for) +O