Определите инфинитивы в каждом предложении и их ФУНКЦИИ 1. То design, construct and operate a laser system is a great technological achievement.
2. To protect the water resources, forests and atmosphere several laws were passed in Russia in the 1970's.
3. A very interesting problem is to produce a practically limitless source'of energy.
4. There are projects to use lasers for long distance communication.
5. Automation makes it possible to obtain and develop new sources of energy.
6. To combine laser and thermonuclear reaction is a very interesting problem for the scientists in many countries.
7. To conduct physical experiments with laser beams Russian physicists have developed large laser installations.
8. Some Western experts consider that it is practically impossible to protect big cities from pollution.
9. Lasers to be placed on Earth satellites will transform solar radiation into laser beams.
10. A special design bureau in St. Petersburg was the first in the world to develop production of superlong escalators.
11. To put some projects with lasers in operation great technological difficulties must be overcome.
12. One of the ways to make planes as economical as possible is to lighten the aircraft by using new composite materials.
13. Signals to be measured must be strong enough.
invitation?
• How do you arrange your birthday party?
Key words:
to accept - to adopt, receive
honour - great respect for smth/to show great respect
to encourage - to give smb support
to refuse - not to accept
unfulfilled - not carried out or completed
impatiently - having no patience
to arrange - organize, plan, schedule
terrific - excellent, wonderful
1
CW. Look through the Languange Focus box and make up a dialogue on Birthday Party. Answer the questions.
1. When and where is the party?
2. What does the person who accepts the invitation say?

3. What reason does he/she give?
4. What does the person who refuses the invitation say?
Language focus
Inviting peopleAccepting invitationRefusing an invitation1. What are you doing at the weekend?1. I’d love to!
That would be lovely!
Thank you!1. Thank you very much!
But ... .
I’m afraid ...2. Would you like to ?2. Thank you! I’d like to come very much!2. I’d love to, but I.3. I’d like to see you..3. I’d really like to come! That sounds great/fun/terrific/ wonderful!3. I’d really like to, but. You can give reasons for refusing:
I am looking after my baby sister.
Agil: What are you doing this weekend?
Fidan: I haven’t decided yet about my plan.
Agil: I’m having a party. I’d love to invite you to waltz . Would you accept my invitation to come to my party?
Fidan: I’d love to. I’d never refuse your request.
Agil: Hope, we’ll have a chance to waltz, too.