Tell 教えて with information
Say 言う the action of speaking specific words
Speak 話すthe action of talking but not with specific words
He speaks English.
He speaks to his mother every day
The teacher tells students to study
My dad tells me that we are taking a trip soon.
The girls tells the boy why she can't go dancing with him.
I always say "You should always be yourself. "
The teacher says that students need to study.
Did you say you wanted me to help?
Speak is just the action of making sounds that are understandable to someone.
Tell is speaking with information or giving some command.
Say is used to tell a particular topic or words that are spoken.
ゲストさんへ
Tell speak sayの違いを教えていただきました。