why引導的什麼從句

例句：

I don't get it ─ why would she do a thing like that?

我不明白——她怎麼會幹那種事？

If you love each other, why not get married?

要是你們彼此相愛，幹嗎不結婚呢？

Why not take a few days off?

爲什麼不休息幾天呢？

Why oh why do people keep leaving the door open?

人們到底爲什麼總敞着門呢？

Why are you so dead set against the idea?

你爲什麼那樣死命地反對這個主意呢？