4. Put the verbs in brackets in the correct tense, and then identify the types of conditionals:

1. If you (not/put up) this shelf, you won’t have anywhere to put your books.

2. If he (change) jobs, he would be a lot happier.

3. If I were you I (tell) her how you feel.

4. If you continue to shout so loudly, you (wake up) the baby.

5. Unless you (feel) any better, you can take the rest of the day off.

6. If you are patient for a few minutes I (be/able) to finish this.

5. Rewrite the following as conditional sentences:

1. You need to go to Egypt to see Sphinx. If….

2. John didn’t leave early so he didn’t get there on time.

3. Calling her might make her feel better.

4. The fax machine is broken so I have to send it by post.

5. There will be an election if the president resigns.

6. Tom didn’t wear a coat and caught a cold.

7. You need to study to pass this exam. Unless…

8. You really ought to go somewhere sunnier to get suntan.

6. Rephrase the following in as many ways as possible using the words from the list below:

only if, otherwise, as long as, unless, providing, on condition that, if

1. Should you go to Rome, you must see the Coliseum.

2. You can swim but there must be an adult with you.

3. Drive carefully so that you won’t have an accident.

4. He will get a bonus if productivity increases.

5. I’ll lend you the money, but you must pay me back soon.

7. Rewrite the following sentences omitting “if”:

1. If I were you, I would think twice before accepting his offer.

2. If you had brought more money with you, we could have gone on holiday.

3. If I were you, I’d leave an hour earlier to be sure of getting there on time.

4. If you get through the theater, could you reserve four tickets for tonight performance?

5. If you had paid the telephone bill on time, your phone would not be cut off.

8. Complete the following sentences with an appropriate conditional clause:

1. If he doesn’t practice more, he …..

2. Unless you get permission …

3. If I could afford it …

4. Were she in my shoes …

5. Had you followed my advice …

6. Only if we stop cutting trees …

7. Were she more sincere …

9. Answer the following questions:

1. Where was Y.O. Paton born?

2. Was he a teacher at Moscow Engineering College of Railway Roads (1989-1904) and Kiev Polytechnic Institute (1904-1938)?

3. When did he organize a welding laboratory and the Electric Welding Committee?

4. What methods did Paton create?

5. In what field did he carry out the research work?

6. What works did he head in post war years?

7. What did Paton found?

10. Communicative situations:

1. You discuss with your friend the possibility of working in the Electric Welding Institute.

2. Pretend that you are a scientist in the distant future. Speak about your greatest invention.

Topic: solar energy grammar: the infinitive

1. Read and memorize the following words and word-combinations:

annually	-щорічно
radiant	-світловий
consumption	-споживання
fraction	-частина
ancient	-стародавній
to harness	-використовувати
to promote	-сприяти
capacity	-здатність