Use of vocabulary and conditionals If I had been a fireman, I would have helped many people in danger as a consequence of the fire. When a fire starts, the people who live in the highest pat of the building must to use the fire escape and not to use the elevator because it is very dangerous in this kind of situation. But, if the fire escape represents a dangerous situation, the people who live in the building need to find a new route of escape quickly, because they could die by the smoke produce by the fire. Also; If I had worked as a fireman, I would have tried to discover a new product for helping people to escape of the fire without problems. If I had tried to invent a new product against the fire, I would have got into a conversation with scientific with more knowledge in this topic. Thank you for the corrections.