Indefinite Pronouns Definition & Examples


Please help with :
Everyone ___ (bring/brings) their own book to the reading session, but someone ___ (forget/forgets) each time.”
Would you mind showing us the correct form here on indefinite pronouns and maybe explaining why?

Hello, and thank you for your question.
Indefinite pronouns are pronouns that refer to a person, thing or quantity in a general way, without being specific. In the examples that you listed above, 'Everyone' and 'someone' are the indefinite pronouns.
Your example sentence is written in the Present Simple. The indefinite pronouns in this sentence are in the singular form, and are treated the same way as the pronouns 'He/She/It'. The rule with these pronouns in the Present Simple is to add '-s/-es' endings to the verb. Therefore, you will choose 'brings' and 'forgets'. Your sentence will read as follows:
Everyone brings their own book to the reading session, but someone forgets each time.
I hope that this answers your question in a satisfactory manner.