why开头的句型结构 像how的其中一个句型结构为how+形容词+a+名词+陈述语序 请全面，谢谢

宾语从句：
Tell me why you did it. 告诉我你为什麽干那件事?
Do you know why the door is locked? 你知道不知道门为什麽锁上了?
用於动词前表示某事不可取或不必要):
Why get upset just because you got a bad mark? 何必因为得的分数差就想不开?
Why bother to write? We'll see him tomorrow. 还写信干什麽? 我们明天就见到他了.
用以提出建议why not (used to make or agree to a suggestion:
Why not go now?现在就去好不好?
Let's go to the cinema.' `Why not?' ‘咱们去看电影吧.’‘好哇.’
why 关系副词 (used esp after reason 尤用於reason一词之後) for which (reason) 因此（原因）: The reason why he left her 他离开她的原因
That is (the reason) why I came early. 这就是我来早了的原因.

1.why do you +动词原形
2. why not +动词原形
3. why don't you + 动词原形
4. Why not?

举个例子why do you ask this question，why——do+sb.+do的结构