It may have a lot of abbreviations. 1 operation; operative; operator. 2 opportunity. 3 opus.

I also went there but I couldn't find Khan there. Khan solves my tiny problems because he is also from Pakistan and me too. He can understand my problems here. Otherwise a native speaker or another teacher can't help me to settle my tiny questions. J.R and Khan clear my concepts, I want to stay connected with them in their chat rooms where they spend their free time sometimes.

Actually, I always ask tiny questions about grammar here but I thought that I will not ask tiny questions on main site that's what I want to know about their chat rooms where I will simply ask them about English grammar. I don't want to mess up the name of this site , having shared the simplest questions.

Yes, I have already said sorry in advance but I want to meet them in their chat rooms please help me to solve the problem. After that , you can delete this question.