1) Have you checked downstairs yet?
你查看过楼下吗?
2) Are you downstairs?
你在楼下吗？
3) Have you ever been to any ball games?
你看过球赛吗？
4) Have you ever been to a horse race?
你曾看过赛马吗？
5) Have you ever seen a bullfight?
你曾看过斗牛吗？
6) Did you ever see a comet?
你看见过彗星吗?
参考词条