In most cases, "say" is a mark of the detailed content of what someone "says". While "tell" means "let someone know" "inform someone" (it implies that, he/she would probably ot know about that until you "tell" him/her) and is always a transitive verb. Talk is always a intransitive verb. To talk with someone means you communicate with each other, you share you feelings, exchange your thoughts and ideas. While to talk to someone focus on the words of one of the bothsides. He says, "blablabla". He said to me, "blablabla". He said (to me), that ... He told me the answer. He told me to sit. He told me, that... He is talking to me. He is talking with me.(We are talking with eachother) Let's have a talk. (noun) If you are still confused, just tell me the specific sentences.

Hello Heidi, First of all 'talk' is a form of communication. I talked to him about .... So that one is simple. Say and tell are often confused by learners as they are both passing the message. The main difference is in structure. You tell somebody something - I told him I was happy - but you say something 'I said I was happy'. Sometimes you might say 'I said Happy Birthday to him' but you need to take care when using this one as it doesn't sound natural when you get it wrong. Hope this helps Bob