what is different between 不，没?

不： is normally used to negate something. deny something that in the future
没：is used to deny something that in the past

"不" is used in the past events, mostly to indicate that the author does not want to.
"没" means objectively negative.
eg:
我不吃早饭。（上课前和下课后都不吃。）
我没吃早饭。（可能下课后吃早饭。）

“不”用于否定主观愿望或性质状态
例如：他不爱吃肉。/ 她并不漂亮。
“没”用于客观陈述或否定事情或变化已经发生。
例如：他没来上班。/ 天还没晴呢。

besides the time distinguish, there is one more thing. "不" stress on personal will. "没" narrate objective facts.
①我今天不吃午饭。(personal will, maybe you want to lose weight, so you dont eat lunch)
②-这一题有问题吗？-没有。(we are in a class, and the teacher ask whether we have problem on this question, we say no)

不同，没意思

toàn cao thủ .

不 is used to negate action at the moment or in the future, and express sth. subjective. eg. : 不开心、不吃。
没 is used to negate action in the past and for sth. objective. eg.: 没有空、没钱。

不 is used to negate action at the moment or in the future, and express sth. subjective. eg. : 不了解、不习惯。
没 is used to negate action in the past and for sth. objective. eg.: 没有书、没发生。

To say it simply
不 is used to negate present or future verbs like : 我不吃 means I don't eat or i wont eat
没 is use to negate past verbs like: 我没吃 means i didnt eat
Note: 没=没有 so you can say 我没有吃 also means i didnt eat
For continuous verbs we also use 没 to negate for example: 我在吃饭 becomes 我没（在）吃饭/我没吃饭 which means im not eating.