Fill in the gaps using modal verbs

Task 2. Make up your own questions to the text.

Task 1. Find the key words in the text.

Compounds and Elements

Read and translate the text.

Task 1. Find modal verbs and their equivalents in the text.

Task 2. Answer the questions:

1. What types of machine tools are there nowadays?

2. What are the basic operations at a workshop?

3. What is a lathe?

4. Why must tools be made of very hard steels and alloys?

5. Is the tool itself big or small?

6. What improves the accuracy of machine tools?

7. What is one of the main factors of engineering progress?

8. What forms the basis for automated workshops?

9. What is the main principle of a flexible line?

All the substances which occur in nature consist of one or more basic elements; a substance containing more than one element is known as a compound.

An element is a substance that can neither be decomposed (broken into a number of other substances) by ordinary chemical action, or made by a chemical union of a number of other substances.

A compound consists of two or more different elements in combination and has properties different from the properties of its constituent parts. Water, for example, is a compound of oxygen and hydrogen.

A molecule is the smallest amount of a substance that can retain the characteristic properties of that substance and may consist, for example, of two atoms of hydrogen and two atoms of oxygen for hydrogen peroxide, of one atom of oxygen and one atom of carbon for carbon monoxide and of two atoms of oxygen and one atom of carbon for carbon dioxide.

An atom is the smallest unit of which a chemical element is built. The atoms of any particular element all have the same average mass and this average mass differs from the average mass of the atoms of any other element.

Revision exercises:

1. Read and translate the adjectives:

1. peace – мир; peaceful –...

2. use – польза; useful –...

3. beauty – красота; beautiful –...

4. care – осторожность; careful –...

5. meaning – значение; meaningful –...

6. success – успех; successful –...

2. Read and translate the adverbs:

1. absolute – абсолютный; absolutely –...

2. comparative – сравнительный; comparatively –...

3. direct – прямой; directly –...

4. easy – легкий; easily –...

5. normal – нормальный; normally –...

6. practical – практический; practically –...

7. ready – легкий; readily –...

8. relative – относительный; relatively –...

9. usual – обычный; usually –...

1. Nina is ill. She... stay in bed.

2. Drivers... stop when they see the red light.

3. Betty asked: "... I open the window?"

4. Betty asked her father: "... I go to the concert tonight?" Her father said, "Yes, you... go."

5. Mary is free tonight. She... go to the dance.

6. Alec will have an English lesson tomorrow. He... study tonight.

7. Mark is a good student. He... speak English well.

8. There is no ink in my pen.... I write with a pencil?

9. My friend gave me an interesting book to read. She said, "You... keep it for seven days."

10. You... do what the doctor says.

11. You … study much if you want to pass the examination well.

12. You... not smoke in the dining-room.

13. Little children... go to bed early.

14. If you are ill, you... consult a doctor.

4. Translate the sentences using modal verbs (can, can't, may, must, to have to, to be able to).

1. Яне могу найти свои часы. – Может быть, вы оставили их на работе. –

Нет, я не могла оставить их на работе: я никогда не снимаю их с руки. 2. Вы сможете поговорить с ним завтра? 3. Я, должно быть, заблудилась. Вы не можете мне сказать, как пройти к Эрмитажу? 4. Мне пришлось прочесть массу книг, когда я готовилась к докладу. 5. Я не мог вспомнить последние строчки сонета, и мне пришлось специально звонить своему другу. 6. Я должна купить торт сегодня. 7. Мой брат не умеет говорить по-английски. 8. Моя сестра умеет говорить по-немецки. 9. Можно, я посмотрю вашу фотографию? 10. Вы можете показать мне свою фотографию? 11. Не может быть, что ему сорок лет: он выглядит гораздо моложе. 12. Не может быть, что он забыл прийти. Он, должно быть, был очень занят. 13. Мы, может быть, поедем за город, если будет хорошая погода. 14. Если сестра не купит мне кофе, мне придется идти в магазин самой.

Дата добавления: 2014-12-17