Hello, this is the first time i'm here..so please tell if there's any grammatical error i have made, thanks. there's something that makes me a bit confusing.. Actually which one of the following is true?
1. ...Yes,I understand.
2. ...Yes,I understood.
And if someone asks whether I understand something or not, I should reply 'understood' or 'understand'? because i think if i said 'understood', that means now i don't understand already because it's past tense word.
So please explain this for me..i'm blur now..