Определите функцию( основной, вспомогательный,
модальных) глаголов TO BE и TO HAVE. 

1. The total length of the new bridge is more than 500 m.
2.With the development of railways the weight and speed of trains have
increased.
3. A large group of designers were invited to the conference.
4. Some old bridges over the Neva have to be reconstructed.
5. The workers are removing all sleepers (шпалы) from the track.