looked for和find与find out以及found和look for都有什么区别?

looked for是look for的过去式,found是find的过去式
look for强调的是寻找的过程,find强调结果,这种查找可能是偶然发现
例如I looked for my pen yesterday,but I didn't find it
我昨天找了我了钢笔,但没找到
find out指查出,它通常要经过一番调查
例如I want to find out who broke my pen
我想查出是谁弄坏了我的钢笔.
希望对你有帮助