English clauses which are not imperatives

[Amitkumar]

English clauses which are not imperatives must have a subject. Sometimes we need to use a ‘dummy’ or ‘empty’ or ‘artificial’ subject when there is no subject attached to the verb, and where the real subject is somewhere else in the clause. 
[b][i]It[/i] and [i]there[/i] are the two dummy subjects used in English:[/b]