Sign grammar rule

I'm not 'sure where the apo'strophe i's 'suppo'sed to go 'so I ju'st put one in front of each 's to be on the 'safe 'side. I ju'st hope that 'some grammar nazi won't a's'sa's'sinate my a's's becau'se of it.

a lot of sign's get grandma wong

My bike's and scooter's what? Sign leaving me hanging