*Speak: is used when one person addresses a group.
-He spoke to the class about the problem.
-Can you speak Chinese?
-I'd like to speak to Mr. Smith.
*Talk: suggests that two or more people are having a conversation
-They talked for hours about movies.
-Can I talk to Mr. Smith?
[sometiems TALK and SPEAK are used with a similar meaning]
*Say: is used with words " " ->Say something to somebody
-She Said nothing all morning.
-As she entered, she said "Hello" to me.
-He said "Goodbye" and left.
*Tell: is used when giving information ->Tell somebody something
-She told me nothing about herself.
-Can you tell me how to get to the bank?
-you can tell the truth/ the time/ a lie/ a story (say a lie)
**Expressions and Related words:
-speech: not talking back to you (large group)
-speaker: to give a speech
-a talk(informal speech) noun-(small group)
-a/the saying
-be on speaking terms with sombody (negative)
-actions speak louder than words
-the facts speak for themselves
-speak/talk of the devil
-talk one's head off, talk one's ear off : talking a lot
-"say when"- tell me when you want me to stop
-say no more:Ii understand, I got it.
-easier said than done: very difficult to do
-before you could/can say ______ : I'll be back before you can say __, "really fast"