12. The chief engineer was instructing all the workers of the plan
=> all the workers of the plan was being instructed by The chief engineer
13. They can't make tea with cold water
=>tea can't be made with cold water
14.  Somebody has taken some of my books away
=>some of my books have been taken away
15. They will hold the meeting before May Day
=>The meeting will be held before may day
16. Window was broken and some pictures were taken away by the boys