Найдите в предложениях модальные глаголы и их эквивалентны:
1. The Iberians were unable to fight back the attacks of the Celts who were armed with metal spears, swords, daggers and axes.
2. For the safety of towns in the evening the townspeople had to put out their fires and lights.
3. Your friend may not know that we are here already.
4. A series of events took place, which was later to work a transformation in the kingdom.