It being sunday,students are at home.改成it is会引发什么问题?

It being sunday,students are at home.改成it is会引发什么问题? It being sunday,students are at home.为什么用it being? 英语阅读判断对错It is Sunday evening.The Chens are all at home.They It is Sunday morning.Su Hai and Su Yang are at home. 英语阅读理解It is Sunday today.Tom and Tim are at home by themselv ______is Mr black at home today? Because it is Sunday It is m____.The students are having lunch at school. it's sunday.Gim's family are all at home短文填空 It't Sunday today.Brother and I are at home.We want to c___ It is now being sent to his home by train ,这里being什么用法 it is sunday morning.the students are having a music class.这 being Sunday today ,we do not have to work.为什么前面要改成it being