Задание 3. A) Из данных предложений выпишите и переведите то, в котором глагол to have выражает долженствование. 1. Another scientist had suggested this idea half a century before Newton. 2. He had to experiment with various alloys, and to grind his own mirrors. 3. Only those who had great thirst for knowledge could develop their talents studying by themselves. B) Из данных предложений выпишите и переведите то, в котором глагол to be выражает долженствование. 1. At 27 he was a professor at Cambridge and was to give one lecture a week. 2. It was Newton who said that light is a combination of different colours. 3. At the age of twelve Newton was sent to the small town of Grantham to attend the Grammar school.

2. He had to experiment with various alloys, and to grind his own mirrors. Ему пришлось экспериментировать с различными сплавами, и шлифовать свои зеркала.1. At 27 he was a professor at Cambridge and was to give one lecture a week. В 27 лет он был профессором в Кембридже и должен был давать (читать) одну лекцию в неделю.