Student or Learner
What is P/S stand for? (I just know that it usually appears at the bottom of a letter, express a small sentence included.)
I don't write it with a /.
Postscript -- something I wanted to add afterwards
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.