Are these verbs regular or irregular?

• Be become• Catch arrive• Buy leave• Enter go• Pull campaign• Explore study • Learn know• Sleep give

Join the sentences using WHILE or WHEN

• Carol was doing the washing up. She broke a glass

• Daniel was having dinner. Emma came in• Tim was playing the violin. The doorbell rang• Liz was driving her car. She ran out of petrol• Ross was working in the garden. It started to

rain• The birds were singing. I opened the window• He was boiling eggs. He burnt his hand