adverb
1
BAD : He has ever been my hero.
GOOD : He has always been my hero.
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ever = at any time: 'Have you ever been to Paris?'
always = from the beginning until now; every time: 'He's always been very generous.' 'She always arrives late.'
2
BAD : She was the most unpleasant person that I had ever met before.
GOOD : She was the most unpleasant person that I had ever met.
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ever (used with a verb in the present perfect or past perfect tense) = at any time before now/then: 'It's one of nicest houses I've ever seen.'
3
BAD : I'm surprised that nobody ever has thought of it.
GOOD : I'm surprised that nobody has ever thought of it.