it is+adj+for sb to do sth的句试造5句不同的话

It is good for us to exercise.锻炼身体对我们有好处.
It is easy for me to work out this problem.解出这道题对我来说很简单.
It is important for us to study.对我们来说,学习很重要.
It is hard for Mary to finish the 1000meters' race.一千米对于Mary来说很难.
It is useful for us to learn English.学英语对我们来说很有用.