Which do you like better,coffee or green tea?I don't like---

either是用于否定句,如I don't like either of them.
neither用于肯定句如：I like neither of them.
同样的意思：他们俩我谁都不喜欢.
如果能区分的开肯定否定,就可以很好的掌握两者的区别了