what is subject, verb and object

what is Subject?

subject is a doer in a sentence. its doing some action the person who do any action is called subject in a sentence .
if you question from verb who, whose and whom then you get the name of subject in a sentence . and that answer will be the subject.
for example

Ram is playing football.

here in a sentence if you questioned from "who is playing football" then you got the answer Ram so you got your subject . Ram is subject of this sentence Ram is doer or doing action.

What is Verb?

verb tells state of action doing in which period of day. whether it does in present or did in past , future .
example

Ram is playing . 

here playing is verb it tell us what he does.

What is Object?

subject what does it called object .
example

Ram is playing football

here what Ram does he play "Football " football is object of sentence .