When you come across confusing synonyms like these, be assured that someone like you has already asked, and someone else has already answered. :) Do a search for "difference between speak say tell talk" ... you will find plenty of good answers on several websites.

Hello Nikita, They are generally used in different ways, although they are all connected with communication. - speak - you 'speak a language' or you 'speak to/with' someone - tell - you 'tell somebody something' or 'tell somebody to do something' (an order) - "I told him about our holiday." "I told him to shut the door." - say - say + something either reported speech or direct speech. "I said 'I loved her.' ", "I said that I had never been there before." - talk - talk to/with somebody (about something) - I talked to him (about the problem.) 'Say' and 'tell' you will normally actually 'say' what has been said in one form or another, 'speak' and 'talk' about the topic. Hope this helps Bob