A ‣ Say (say / said / said) 

We use say when we ask about language.
We use say when we report someone’s words.
She said, ‘This is horrible!’
He said that he wanted a drink.
We say hello / goodbye and we say please / thank you / Happy Birthday / Merry Christmas / Happy New Year / Congratulations! /kənɡrætʃəˈleɪʃənz/
B ‣ Tell (tell / told / told)
Tell is usually followed immediately by a person.
Say is not followed immediately by a person.
Tell is oft en used with how and wh- words (when, what, why, where) to find out and give information.
Tell me when you want to have dinner. She told me how to fill in the application form.
You can tell someone the time / a story / a joke / your name / your address / your phone number.
Common mistakes
He told me his name. [NOT He said me his name.]
Common mistakes
Can you tell me where the bus station is, please? [NOT Can you say me … ?]
C ‣ Ask
Ask is used for questions.
My sister asked me where I was going. / My sister asked (me), ‘Where are you going?’
A: Can I ask you a question?
B: Yes.
A: What day of the week were you born?
B: Thursday.
You can ask someone the way / the time.
You can ask somebody to do something and ask someone for something.
I asked him to turn off his radio. (or I said, ‘Please turn off your radio.’)
She asked for the bill. (or She said, ‘Can I have the bill, please?’)
D ‣ Speak / talk / answer / reply
I like talking to you. [having a conversation with you]
Common mistakes
Do you speak Japanese? (used for languages) [NOT Do you talk Japanese?]
Can you
answer the telephone / the door, please? [pick up the phone / open the door to see who it is]
Teacher: Who can answer the next question? Joanna?
He didn’t reply to my email. (also used for letters / texts) [he did not send me an email back]