他总是毫无理由地批评别人的选择。

He keeps ___knocking other people's choices for no reason.

有人在用力敲窗户，可能是想让我们注意到他们。

Someone is ___knocking hard on the window, probably trying to get our attention.

有人在外面用力敲门。

Someone is ___knocking loudly on the door.

别总是批评她的决定，她也在尽力做得更好。

Stop ___knocking her decisions; she's trying her best to improve.