hi, nice to know you are put Thai into your hard work. let me try to make it simplified ไม่ no ใช่ไหม is it correct? is it like this? (this one is more like general question) รึเปล่า = we'll use when we are unsure in certain things. หรือ or ( sometimes also could lead to question too) also s.t. it works slicely as รึเปล่า ผู้ชายหรือผู้หญิง man or woman? สิ่งที่เธอทำสมควรแล้วหรือ(รึ)? Is it deserved to be done that? (i'm not sure in english lol) ใช่เธอหรือ(รึ) Is that you? hope it helps!

Hi...!!! I try to explain but I'm not good in English :) But If you still don't understand..... I'll try to explain more... ;-p ไม่ means NO.... It uses for decline or disagree or deny in the sentense. ใช่ไหม means Right? (question word) It uses when you tell something and need someone to confirm the thing that you tell is correct...An answer is yes or no รึเปล่า means Or not? or correct or what ? (question word) It looks like the ใช่ไหม but an answer normally express their opinion...Ex... The world is flat or what?.. Oh..no... It's circle like an orange. หรือ means OR.......to choose one....this or that...., right or wrong, correct or what..etc. I hope you can understand my answer....!!! ;-D