EX 1. Put the verbs in brackets into the correct form of conditional sentence type 1.

1.   If people (pollute)                         the environment, a lot of animals (die)                      .

2.   If water (consist)                            germs, people (get)                  ill.

3.   If the poles (melt)                                     , huge landmasses (be)                         under water.

4.   Many precious animals (disappear)                       , if people (cut down)                                      trees.

5.   If nuclear waste (throw)                            away, it (be)                            very dangerous.

6.   If the emission of CO₂ (continue)                          at high rate, the climate (destroy)                              .

7.   We (save)                            the trees If we (save)                         paper.

8.   If schools (teach)                           about environmental problems, All students (know)                          how to protect the environment.

9.   If more people (travel)                               by bike or bus, we (not have)                          traffic jam.

10.       If the government (fine)                      heavily to the factories, they (not dump)                                 

Put the verbs in brackets into the correet form of conditional sentence type1

1. If people( pollute) .............the environment, a lot animals( die) ...............

2. If water( consist) ..............germs, people( get) ............ill

3. If the poles( melt) ............huge landmaese( be)..............under water

4. Many precious animals( disappear)..........., if people( cut down)......... trees

5. If nuclear waste( throw) ..........away, if( be)...........very dangerous

6. If the ernission of CO2( continue)........ at high rate the climate( destroy).......

7. We( save) ......... the trees if we( save)..........paper

8. I schools( teach) .........about environmental problems, all students( know)...... how to prolect the environment

9. If more people( travel) ........by bike or bus, we( not have) .........traffic jam

10. If the government(fine) ........... heavily to the factories, they( not dunp) sewage into the ocean

EX 2. Put the verbs in brackets into the correct form of conditional sentence type 2.

 1.  If I (be)                  the president, I (pass)                          harder regulations for using fertilizers in agriculture.

2.   If I (be)                  you, I (not eat)                        that genetically modified potatoes.

3.   If big corporations (care)               more about the environment and less about their own pockets, the pollution from factories (not increase)                               so fast.

4.   He             (sort)                             his trash, if he (be)                  smart.

5.   If the seas (pollute)                       , maybe the population of whales (recover)                            .

6.   If I (not throw)                              this can of Coke into the bushes, I (not know)                                   that Coke is poison for wild animals.

7.   If the factories (not dump)                        untreated waste into the ocean, fish (die)                  massively.

8.   What (do)                           you if you (be)            President.

9.   If the air (not be)                            dirty, the breathing problems (reduce)                       .

10. If I (own)               a lonely island, I (build)                      a huge house by the beach.

8. Put the verbs in brackets into the correct form of conditional sentence type 2. 1. If I (be) the president, I (pass) harder regulations for using fertilizers in agriculture. 2. If I (be) you, I (not eat) that genetically modified potatoes. 3. If big corporations (care) more about the environment and less about their own pockets, the pollution from factories (not increase) so fast. 4. He (sort) his trash, if he (be) smart. 5. If the seas (pollute) , maybe the population of whales (recover) . 6. If I (not throw) this can of Coke into the bushes, I (not know) that Coke is poison for wild animals. 7. If the factories (not dump) untreated waste into the ocean, fish (die) massively. 8. What (do) you if you (be) President. 9. If the air (not be) dirty, the breathing problems (reduce) . 10. If I (own) a lonely island, I (build) a huge house by the beach.

Put the verbs in brackets into the correct form of conditional sentence type 2 

1. If I(be) .........the qresident, I(pass) .........harder regulations for using fertilizers in agriculture 

2. If I(be) ..........you, I(not eat) ........that genetically modifed poetatoes 

3.If big corporations( care) .........more dbout the environment and less about their own pockets, the pollution from factories( not increase)..........so fast 

4. He( sort)......... his trash if(be)..........smart

5.If the seas( pollute).........,  maybe the population of whrow( recover)..........

6. If I(not throw)...........this can of coke into the bushes, I(not know)............that coke is poison for wild animals

7. If the factories( not dunp) ..........untreated waste into the ocean, fish( die)........massively

8. What( do) .........you if you( be).........Preident 

9. If the air(not be) ..........dirty, the breathig problems( reduce)...........

10.If I(own)........a lonely, island, I(build)......... a huge house by the beach 

Exercise 1. Put the verbs in brackets in the correct form of conditional sentence type 1.

1. If we _____________ (send) an invitation, our friends _____________ (come) to our party.

2. He _____________ (not/ understand) you if you _____________ (whisper).

3. They _____________ (not/ survive) in the desert if they _____________ (not/ take) extra water with them.

4. If you _____________ (press) CTRL + S, you _____________ (save) the file. 5. You _____________ (cross) the Channel if you _____________ (fly) from Paris to London.

6. Fred _____________ (answer) the phone if his wife _____________ (have) a bath.

7. If Claire _____________ (wear) this dress at the party, our guests _____________ (not/ stay) any longer.

8. If I _____________ (touch) this snake, my girlfriend _____________ (not/ scream).

9. She _____________ (forget) to pick you up if you _____________ (not/ phone) her.

10. I _____________ (remember) you if you _____________ (give) me a photo.

Exercise 2. Put the verbs in brackets in the correct form of conditional sentence type 1.

1. If I _____________ (study) hard, I _____________ (improve) my English.

2. Theresa _____________ (go) to Japan if she _____________ (get) a cheap flight.

3. If her boyfriend _____________ (not call) today, she _____________ (leave) him.

4. If the phone _____________ (ring), _____________ (you/answer) it? 5. What _____________ (you/do) if you _____________ (not find) your wallet?

6. He _____________ (find) a part time job if he _____________ (keep) looking.

7. If you _____________ (feel) unwell tomorrow, _____________ (take) a rest.

8. If they _____________ (not tell) us, we _____________ (keep) asking. 9. _____________ (you/let) me go if I _____________ (promise) to come back early?

10. He _____________ (eat) some popcorn if he _____________ (feel) hungry.

Exercise 3. Put the verbs in brackets in the correct form of conditional sentence type 1.

1. If I _____________ (study), I _____________ (pass) the exams.

2. If the Sun _____________ (shine), we _____________ (walk) to the town.

3. If he _____________ (have) a temperature, he _____________ (see) the doctor.

4. If my friends _____________ (come), I _____________ (be) very happy.

5. If she _____________ (earn) a lot of money, she _____________ (fly) to New York.

6. If we _____________ (travel) to London, we _____________ (visit) the museums.

7. If you _____________ (wear) sandals in the mountains, you _____________ (slip) on the rocks.

8. If Rita _____________ (forget) her homework, the teacher _____________ (give) her a low mark.

9. If they _____________ (go) to the disco, they _____________ (listen) to loud music.

10. If you _____________ (wait) a minute, I _____________ (ask) my parents.

Exercise 4. Identify the one underlined word or phrase that must be changed to make the sentence correct:

1. If (A) someone came (B) into the store, smile (C) and say, “May (D) I help you?”

2. If (A) you do not understand (B) what were written (C) in the book, you could ask (D) Mr. Pike.

3. If (A) there isn't (B) enough food (C), we couldn't continue (D) our journey.

4. If (A) anyone will phone (B), tell (C) them I'll be (D) back at 11:00.

5. I will come (A) to meet Mr. Pike and tell him about(B) your problems if (C) you didn't solve (D) them.

I . put the verbs in brackets into the correct form

1. If we ( recycly ) ............ more , we will help the Earth

2. Factories ( not dump ) ............. waste into rivers if the government fine them heavily

3. If people travel to work by bus , there ( he ) ................ fewer ear fumes

4. We ( save ) ............... thousands of trees if we don't waste paper

5. If we use water carefully , more people ( have ) .............. fresh water

6. If the factory ( continue ) ................. dumping poison into the lake all the fish and other aquatic animals will die