It' fun to do sth 这句有没语法错误,It's+ adj 后面什么时候加to do sth 什么时候do

It' fun to do sth 这句有没语法错误,It's+ adj 后面什么时候加to do sth 什么时候do It's adj to do sth 例句 It's adj to do sth it adj to do sth 和it's adj to do sth的区别 为什么说it's +adj+to do sth 而不是it's+adv+to do sth It's fun to do sth.中的fun什么词性 It's fun 后面是跟doing sth.还是跟to do sth. it's+adj.to do sth和it's+adj.for sth区别 find it adj. to do sth.是什么意思 find it+adj.to do sth. make it adj.to do sth. it is+adj+to do sth.意思