"Is he ban?" is not correct :(
"ban" is a noun, not an adjective/participle. You can say "There's a ban on beef importation" for instance.
"Is he banned?" is correct.
I use to sleep here <-- incorrect. Use doesn't work that way as far as I know.
I'm used to sleeping here <-- correct. It means you do it often and don't have any problem with it.
I used to sleep here <-- correct. Some time ago he sleeped there, but he doesn't do anymore.
FRC |