They____(try)to catch that train but failed

题目

They____(try)to catch that train but failed
Thanks for____(let)me___(play)the game.Are they trying____(pull)up the boat back?

答案

1 tried (与 failed 时态一致）
2 letting; play
固定用法：thanks for doing sth 谢谢某人做某; let sb do sth 让某人做某事.
3 to pull
固定用法：try to do sth 试图做某事
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