Present perfect 1. marking positive and negative sentences have you ever done these things? put a tick (γ) or a cross (ˣ) next to each one. then write sentences. write a letter to a newspaper (ˣ) ski in the alps meet a famous person visit the vatican win a prize sing in public read dante`s inferno 1. i`ve never written a letter to a newspaper. 2. 3. 4. 5. 6. 7.