Matching Pairs matching BOnline version matching when and while by Kristina Topalova 1 Mr Carter took all our names while... 2 We were waiting for the firefighters when... 3 Joe was painting when... 4 A boy fell over while... 5 The fire alarm rang while... we were standing outside. we saw the smoke. he was running out of the building. I was doing a science experiment. he heard it.