Finite verb

A finite verb is a one, two, three or four-word verb, which acts as a single meaningful sentence part and is essential (necessary) for the existence of the sentence.

Examples of finite verbs are:

eat

is eating

has been eaten

will have been eating

Source 2 :

Object :

This is usually a noun phrase, i.e. a group of words built around a noun or  a pronoun. The object answers the question:

finite verb + whom?or

finite verb + what?

      As in these examples:

     The teacher praised the student. (praised whom?—Answer: the student)

     Ahmad eats mangoes. (eats what?—Answer: mangoes)

     The student and mangoes are the objects in the above sentences.