have seen a wolf

• 张口结舌；说不出话来

have seen a wolf的用法和样例：

例句

1. He gaped at them for a moment, then swayed and sat down.
   他张口结舌地瞧了他们一会儿，然后摇晃着身子坐下。
2. He remained tongue-tied for a long time.
   他半天说不出话来。