区分英语句型It's …… + for / of sb.to do sth .for sb 和 of sb 的区别

It's adj for sb.to do sth .是一个百搭句型,
for sb表示事物特征或特点,形容词是对所做事物的描述
of sb表示对人性格、品质描述
总之一句话,for sb 描述事物,of sb 描述人的品质
如it 's difficult for me to choose the right hairstyle
it 's foolish of you to go to such an important appointment with messy hiar.