dear all i've problem
what is the difference between there is ,there are and it is
I'm not a teacher.
We use there is, there are at the beginning of the sentence when we tell that something exists or not: There is an actor on the stage/There are no actors on the stage.
We use it is to avoid a sort of clumsiness with sentences which otherwise would have to begin with that-clause (That you should like him is interesting) or an infinitive phrase (To be with you is nice). Instead, we begin the sentence with it: It's nice to be with you. It's interesting that you should like him.
(See: Practical English Usage by Michael Swan, 1980 edition, p.349)