never would have和单独一个never 的意思有什么不一样吗 可以举例子吗

1.首先,你要知道,"would have never" 是假设性的过去式,代表你所假设的动作已经完成了.还有,"would havenever" 是否定语 (negative)
"Never would have" is usually followed by "if .",meaning:
the action is completed,the person is suggesting a hypothetical situation
如果你后悔做了某种事情 (那种事情你已经完成了),你会"假设"自己"如果"预先__ (verb),你"不会"(would have never)做__ (past participle)
Ex.If I knew he is sick,I would have never gone to his house.
如果我知道他生病了,我不会去他的家.
Ex.If he was smart enough,he would have never stolen from my house.
如果他很聪明,他便不会从我的店里偷窃.
or the person wants to state an opinion 如果你想"强调"你"一定不会"做某种事情
Ex.I did not saythat.I would have never said that.
我没有这样说.我一定不会这样说.
这里的文法是过去式.因为你在强调你没有这样做,而且你当时一定不会这样做.
***Notice how I used "would have never"
in my sentences instead of "never would have",that's because
"never would have" is not gramatically correct.
如果你想说你在现在,或将来一定不会做某种事情,你要用现在式present tense
Ex.I would never cheat.
我(永远)不会作弊.
STRUCTURE:I would never + ___present tense_____.
Ex.I would never eat cheese because it tastesterrible.
将来也不会)吃芝士,因为它很难吃.
2.By just using the word "Never",it means the person did not perform the action,in other words,他"没有"做过.
(这也是否定词)
(过去现在式)
Ex.He has never committed a crime in hislife.
他从来(以前到现在)没有犯罪.(这个action还以前到现在还在继续)
STRUCTURE:has/have + _____(past participle)--------
(过去过去式) w