None of the fish had eggs in its body. *may use singular or plural verb
A number of the fishermen were proud of their catches.
An indefinite pronoun may refer to nouns other than itself.
Everyone took my bag of chips.
Each of the fishermen took our cookies.
“Everyone’s” Problem – Gender Neutral Phrasing
Objections to ‘gender preference’ in our English language has affected pronoun choice. Many speakers feel awkard choosing a masculine pronoun to refer to both genders..
Everyone had their hat. The pronoun and noun do not agree in number.
Everyone had his hat. Use “his” for both genders – formal but awkward. Everyone had her hat. Specifiy gender for all females. Everyone had their hats. Use plural form to be gender neutral (neither masculine nor femine) and the plural noun form – informal to formal use. Everyone must file his income tax by April 15. Only men have to file their taxes?Everyone must file his or her income tax by April 15. Conventions are formed with time and this one is not decided yet.