Ever means at any time. It is used in questions and negative statements.
I'm not sure I'll ever trust people again.
我不确定我会不会再相信人。
Neither of us had ever skied.
我们俩谁也没有滑过雪。
You use ever in expressions such as 'did you ever' and 'have you ever' to express surprise or shock at something you have just seen, heard, or experienced, especially when you expect people to agree with you.
Have you ever seen anything like it?
你可曾见过像这样的东西?
You use ever after comparatives and superlatives to emphasize the degree to which something is true or when you are comparing a present situation with the past or the future.
She's got a great voice and is singing better than ever.
她有一副好嗓音,现在比以往任何时候都唱得好。
Japan is wealthier and more powerful than ever before.
日本现在比以往任何时候都富有和强大。
You use ever to say that something happens more all the time.
They grew ever further apart.
他们愈发疏远了。
You can use ever for emphasis after 'never'.
I can never, ever, forgive myself.
我绝不能原谅自己。
You use ever in questions beginning with words such as 'why', 'when', and 'who' when you want to emphasize your surprise or shock.
Why ever didn't you tell me?
你究竟为何不告诉我?
ever since
If something has been the case ever since a particular time, it has been the case all the time from then until now.
He's been there ever since you left!
自从你离开,他一直都在那儿!
I simply gave in to him, and I've regretted it ever since.
我当时完全向他屈服了,从此我为此事后悔不迭。
all someone ever does
You use the expression all someone ever does when you want to emphasize that they do the same thing all the time, and this annoys you.
All she ever does is complain.
她就会抱怨。
as ever
You say as ever in order to indicate that something or someone's behaviour is not unusual because it is like that all the time or very often.
As ever, the meals are primarily fish-based.
像往常那样,餐餐以鱼类为主。