but yet while however 区别

but 而是；但是 Not one, but two! 不是一，而是二！ 尽管…还是 tired but happy 尽管累却很快活 可是；然而 I was going to write, but I lost your address. 我本来要写信的，可是把你的地址弄丢了。 yet(用于疑问句和否定句) 还，尚，仍 He has not come yet. 他还没有来。 She is yet a child. 她还是个孩子。 He was poor, y