never与ever的区别及用法

区别是明显的.前者比后者多了个n,这个n源自not,是ever的否定.
从词性上讲,它们都是副词.有ever的是可以用在否定句、肯定句或疑问句中,多用于疑问句中和否定句中,有never的是否定句,是not ever变过来的.如：
Have you ever been abroad?
I have never been abroad.
ever在肯定句中有很多种用法,翻译很灵活.例句可以从词典中找：
(无比较级、最高级)
1 a.曾经,从来
Have you seen a tiger?.
你见过老虎吗?
Did you see him while you were in Paris?.
你在巴黎时曾见过他吗?
How can I thank you (enough) .
我真不知道该如何感谢你?
b.(不) 曾…; 决 (不…)
Nobody comes to this part of the country.
没有人曾经来过该国这个地区
No Chinese tourist has come to this town.
没有任何中国观光客来过这个镇上
c.曾经
If you (should) come this way,be sure to call on us.
如果你打这儿来,一定要来看看我们
If I catch him!.
要是我逮到他 (我决不饶他) !
He is [was] a great musician if there was one.
如果曾经有过伟大的音乐家,那他就是一个
d.[在比较级、最高级之後用以强调] 以往,迄今
It is raining harder than .
雨越下越大了
He is the greatest poet that England produced.
他是英国有史以来最伟大的诗人
2 a.经常,总是,始终
He repeated the same words.
他总是重复同样的话
He is quick to respond.
他的反应总是很快
→ EVER since
They lived happily after (ward).
从此以後他们就过著幸福的日子

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(www.yygrammar.com)。　　
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。