i find it hard to keep a dog hard 是形容词,为什么前面没有be?不是 it is adj to do

题目

i find it hard to keep a dog hard 是形容词,为什么前面没有be?不是 it is adj to do

答案

i find it hard to keep a dog hard在这里it是做find的形式宾语,相当于I find to keep a dog is hard.find 后面的to keep a dog 太长因此用it来做find的形式宾语.于是有了Sb find it adj to do sth的固定句型而IT IS...