一、never的用法
1.never主要与肯定动词连用而不与否定动词连用。一般情况下它意为“从未有过”：
Some people are never satisfied.有些人从不满足。
I was never very good at maths.我在数学方面从来就不很好。
A clever politician never promises too much.聪明的政治家从不过多地许诺。
Have you met Marilyn.I've never met her.你见到过玛里琳吗?我从未见到过她。
2.never+肯定动词有时可以替代一个普通的否定动词：
I waited but he never turned up.我等着，可他根本没有来。
3.never+疑问动词可表示说话人对于未能做到某事而感到惊讶：
Has he never been to Japan?I'm surprised,because his wife is Japanese.他从没去过日本吗?我感到很惊讶，因为他妻子是日本人。
二、ever的用法
1.ever意为“在任何时间”，主要用于疑问句中：
Have you ever been a teacher?你当过教师吗?
Have you ever seen a gorilla?你看到过大猩猩吗?
Have you ever seen any film like that?你看过这样的电影吗?
Have you ever heard a pop song sung in Japanese?你听见过有人用日语唱流行歌吗?
2.ever可与否定动词连用，特别是在与复合时态连用时，可代替never+肯定动词：
I don't ever want[never want]to see you again.我永远不想再见到你了。
He doesn't ever complain.=He never complains.他从来不抱怨。
I promise you,he won't ever[will never]trouble you again!我向你保证，他绝不会再打扰你了！
3.ever+肯定动词可以用于比较中，也可以和表示假定和怀疑的词连用：
I don't suppose he ever writes to his mother.我想他没有给他母亲写过信。