8. Перепишите и письменно переведите следующие предложения; подчеркните в них модальные глаголы или их эквиваленты.

1. The most fundamental law in physics states that energy can neither be created nor destroyed. 2. Amorphous semiconductors may possibly find a technical application for solar cells. 3. He must find this article: its subject is closely connected with his work. 4. The history of the silicon solar cell began in 1954. A large-scale application, however, had to wait until the advent of the space age three years later. 5. You are to apply the mean value of the voltage, no matter which device you use. 6. The student should be able to define basic theoretical principles.

1. The most fundamental law in physics states that energy can neither be created nor destroyed.

2. Amorphous semiconductors may possibly find a technical application for solar cells.

3. He must find this article: its subject is closely connected with his work.

4. The history of the silicon solar cell began in 1954. A large-scale application, however, had to wait until the advent of the space age three years later.

5. You are to apply the mean value of the voltage, no matter which device you use.

6. The student should be able to define basic theoretical principles.

1. Самый фундаментальный закон физики гласит, что энергия не может быть ни создана, ни уничтожена. 2. Аморфные полупроводники, возможно, найдут техническое применение в солнечных элементах. 3. Он должен найти эту статью: ее тематика тесно связана с его работой. 4. История кремниевого солнечного элемента началась в 1954 году. Однако с крупномасштабным применением пришлось подождать до наступления космической эры тремя годами позже. 5. Вы должны применять среднее значение напряжения, независимо от того, какое устройство вы используете. 6. Студент должен уметь определять основные теоретические принципы.

1. You work hard at your English if you want to know it. (can, may, must)

2. You feel bad, you see a doctor, (needn't, should, can)

2. The lights are on. They be at home, (may, must, are to)

3. She _ _ to finish school in a year, (may, has, is)

4. I'm afraid the weather change for the worse, (must, may, should)

5. When this scientist was 21 years old he solve a very important mathematical problem, (could, was able to, had to)

1. You must work hard at your English if you want to know it.

2. You feel bad, you should see a doctor.

3. The lights are on. They must be at home.

4. She is to finish school in a year.

5. I’m afraid the weather may change for the worse.

6. When this scientist was 21 years old he was able to solve a very important mathematical problem.