1) What is Mr. Brown doing now? 2) When did Mr. Brown break his leg? 3)How long has he had a broken leg? 5) How long have they been talking? 6) How long ago did Mr White have his cold? 7)How long has he had a bad cold 8)Mrs Green and her two children have already been waiting for 20 minutes 9)When did Henry started reading the magazine? 10) How long has baby had a cough?