I didn't know I wasn't supposed to.我不知道不能这样做

今天的几个句子是有关叙述、询问理由的：1.What makes you think that? 你怎么会那么想呢？2.You seem especially happy today. 你今天显得特别高兴。3.Why do you want to do that? 你为什么想做那件事？4.How did Edison make the light bulb? 爱迪生是怎样发明灯泡的呢？