A class of words that ‘stand in’ for other words, usually:
 Nouns.
 Noun phrases.
 Other pronouns.
Pronouns enable the writer and speaker to avoid long-winded repetitions of things that have already been expressed.
Pronoun fall into seven groups:
 Personal pronoun.
 Possessive pronoun.
 Reflexive pronoun.
 Demonstrative pronoun.
 Interrogative pronoun.
 Relative pronoun.
 Indefinite pronoun.
For Scientific english editing and Medical Writing Services visitwww.manuscriptedit.com