为什么他花了这么多钱？
why did he spend so much money?
为什么他要这么多钱？
why does he need so much money?
你为什么这样大叫大喊？
what are you shouting like this for?
我不懂他为什么说这话。
I don't know why he said this.
你为什么不说话？
why don't you say anything?
我真不明白，你为什么会这样想。
I really don't understand how you can think this.
这种观点为什么一直能存在呢？
how can this kind of viewpoint still continue to exist?
“你今天别去了！”“为什么？”
"Don't go today!" "How come?"