How to convert these sentences into past tense?
He plays as if he were a professional. You look as if you knew the knew the secret.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.
Look at this sentence if it is okay.
You anger as if your cell was broken by me.
We don't use "anger" in this way. It's either a noun, or it's used as a verb in (for example) "It angered me that you thought I was lying" or "He angers his wife on a regular basis". In that context, it means "to make someone else angry".