why not后面加什么形式的动词

　　Why not tell her you're quitting and have done with it?

　　为什么不告诉她你打算辞职，尽快把这件事了结了呢？

　　What you need is a change of scene. Why not go on a cruise?

　　你需要的是换个环境。为何不乘游轮去旅行呢？

　　I didn't want a part in the play, then I thought—stuff it—why not?

　　我本来没想在剧中扮演角色，然后又一想—管它呢—干吗不演？

　　If you are selling your property, why not call us for a free valuation without obligation.

　　如果你打算出售房产，为什么不打电话让我们做个免费的评估呢。