Binding off in rib

I need help. My pattern calls for binding off in rib but I’ve never done this and have no idea how to. Any suggestions are appreciated.

Thanks. Hope :??

It’s really just like knitting a row the only difference is you’re passing the one st over another when you’re done instead of leaving them on the right needle. So do the first 2 sts as you normally would (k2, or k1,p1 whatever the rib is), pass the 1st st over the 2nd one. Do the next st whatever it’s supposed to be, pass the 1st st over, repeat.