It is diffcult for us stand up
It is diffcult for us stand up
It is diffcult for us to do it It是形式主语 is diffcult是谓语 for 是介
Staying up late is bad for us同义句It is for us up late
To do it for him is diffcult对还是 To do it is diffcult for him
The story is too diffcult for us to understand
To do it is diffcult for me is diffcult 是谓语吗 me是宾语吗
To do it is diffcult for him这个句子对吗
用it is diffcult for sb to do sth造句
It is time for you to stand up on your own feet
It is diffcult for him to do it 谓语是is diffcult吗 那for只是介词吗
It is diffcult for him to do it 谓语是is diffcult 那for只是起连接作用把
It is diffcult for him to do it 谓语是is diffcult吗 那for只是介词连接吗