Every English word belongs to one of eight parts of speech. The same word can change its category based on how it is used in a sentence, so learning to spot the role of a word is the foundation of grammar accuracy in objective exams.
Spotting Errors, Sentence Improvement, Fill in the Blanks and Cloze tests in SSC CGL/CHSL, RRB NTPC, IBPS PO/Clerk and Insurance exams routinely test the difference between adjective vs. adverb, preposition vs. conjunction, and noun vs. verb forms.
A noun names a person, place, thing, idea, quality or activity.
A pronoun replaces a noun to avoid repetition.
A verb expresses an action, occurrence or state of being.
An adjective qualifies or describes a noun or pronoun.