Hi Sopromat, The constructions you are talking about can suggest that someone either should or has to do something, that it's either recommended or obligatory for them to do something. It very often is followed or suggests that the person isn't planning on doing it or hasn't already done it. For example, you could say "I'm meant to wash the dishes, but I'm not going to wash them." Here "I'm meant to" is used to show that is expected of me to wash the dishes, that I should do them or that I have to do them. Another example, "I meant to take the dog for the walk (but I forgot)." Here it shows that I should have taken the dog for a walk. I hope this helps and good luck with learning English.