Tell him to meet you us here.
Can you say your name again?
Say: to express something using words.
Tell: to give information to a person!
A: Where are they going?
B: She didn't say.
A: Where are they going?
B: She didn't tell me.
(She didn't give me the information.)
A: What did he say?
B: What did he tell you?
( What information did he give you?)
I want to say something about our teacher.
I want to tell you something about our teacher.
Did he say how it happened?
Did he tell you how it happened?