while, but, nevertheless, however, whereas到底有啥区别?

while：有表达对比的意思,While I was taking care of our baby, she was out with her friends and didn't come back until midnight。我在看孩子的时候她跟朋友在外头玩儿到半夜才回来。
but,但是。例： I want to have dinner, but I have to take a shower first。
however 和but的意思很接近,只是更为正式一些。I don't want to have dinner。 However, watching a movie together would be great。
nevertheless是尽管。,而。,举个例子：I know everybody hates him。 Nevertheless, I have decided to marry him。我知道大家都不喜欢他。就算这样,我要是要嫁给他。
whereas有两个常用的意思,一个是“鉴于”,一个是反之。是连词。Whereas I tend to take a faster train for the meeting, they tend to leave a day early。 他们想早走一天去开会,我却倾向于坐个快点的火车。