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