Сна времена simple past / present perfect / past perfect 1. when jack (enter) the room, i (recognize, not) him because he (lose) so much weight and (grow) a beard. he looked totally different! 2. the maya established a very advanced civilization in the jungles of the yucatan; however, their culture (disappear, virtually) by the time europeans first (arrive) in the new world. 3. i (visit) so many beautiful places since i (come) to utah. before moving here, i (hear, never) of bryce canyon, zion, arches, or canyonlands.

1. When Jack entered the room, I didn't him because he had lost so much weight and had grown a beard. He looked totally different! 
2. The Maya established a very advanced civilization in the jungles of the Yucatan; however, their culture had disappeared by the time Europeans first arrived in the New World. 
3. I have visited so many beautiful places since I came to Utah. Before moving here, I have never heard of Bryce Canyon, Zion, Arches, or Canyonlands.