it's adj for sb.还是 it's adj to sb.“to”和“for”分别什么时候用?

it's adj for sb.还是 it's adj to sb.“to”和“for”分别什么时候用? It's adj to sb什么用法?It's adj to sb和It's adj for sb有什么区别么?我们老师说for sb后跟to do sth,但我还是不太明白,能举个例子么, It's+adj.+for sb.和It's+adj.+of sb.有什么区别? 用“Its+adj+for sb to do sth”造句 It's adj .for sb.to do sth . It's+adj+for sb to do sth.表示? It's+adj+for sb+to do sth是什么意思? 英语翻译使用It's adj for sb to do sth . It's adj to sb和It's adj for sb用to和用for的区别? I think it + adj + for sb to do sth it's adj.of/for 的疑问it's adj.of sb to doit's adj.for sb to do 有什么区别it's adj.for it's adj.of 我懂了 总结It's+adj.+for sb.to do sth.和It's+adj.+of sb.to do sth It's adj for sb to do sth和It's adj of sb to do sth有什麽区别? to 跟 for 的区别.我只到it's important “to” sb和it's important “for” sb to do sth但如果important是dangerous,useful这些别的adj呢?to sb跟for sb还是这么用吗?I always come up with good solutions topeople's problems.这边 it's+adj.+of +sb.it's +adj.+for sb.这两句的用法it is adj.of sb.和is adj.for sb.这两句如何理解含义和用法. It's +adj of sb to do sth 和 It's for sb to do sth有什么区别?It's +adj of sb to do sth 和 It's + adj for sb to do sth有什么区别？ it's +adj+for sb+to do sth与 it's +adj+to do sth+for sb 是否意义一样?it's +adj+ for sb +to do sth中的 for sb,是否可以放在最后,it's +adj+to do sth+ for sb 在意义上,是否有区别?for sb放在最后，是否有歧义？for sb， it's adj for sb to do和of sb to do有什么不同