1. had the guests come, i the house 1. must clean 2. will clean 3. would clean 4. would have clean 2. all the students will be on monday 1. examines 2. examine 3. examined 3. what is that noise? somebody the piano 1. practises 2. practise 3. is practising 4. but for you, i my work 1. wouldn't finish 2. didn't finish 3. couldn't finish 4. will not finish