Задание 3. Перепишите предложения, переведите, обращая внимание на различные функции глаголов to be, to have, to do , укажите функцию глагола. 1. Unfortunately we’ll have to postpone the meeting with our business partners. 2. They will do everything in their power to help us. 3. A limited liability company or a corporation is headed by a board of directors elected by shareholders. 4. These machines have been sold at a profit. 5. The team of experts is to study the present situation in the country.

Well have to-эквивалент модального глагола must-должны .Future Simple.
will do-Future Simple.
is headed-Present Simple Passive
4have been sold-Present Perfect Passive.
5is to study-эквивалент модального глагола must.to be to.Present Simple.