Use ‘say’ to to speak in general about something that has been said by someone. ‘Say’ is often used to report what someone else has said.
John said he had a good time in Las Vegas.
The teacher often says we need to study more.
Important Note: ‘Say’ refers to any type of speech and is therefore more general in nature.
Verb Forms: Say – Said – Said – Saying
Use ‘tell’ to mean that someone has instructed or informed someone else of something.