你可以用英语怎么说 就是【你可以】麽?You can.这是最简单的【你可以】You can do it.You can make it.后两个是【你能行】【你能做到】的意思
做你想做的用英语怎么说 Just do what you want to注:want to do 是固定搭配,因为前面的谓语与want to do 中的do 相同,所以将不定式to后面的do省略.
“为什么要这么做”用英语怎么说? a simple\"why?will do.只是简单的一个\"Why?就可以了.如果你非要复杂的,那就Why do you do it in that way?Why did you do that/so?