Put the verbs in brackets into the correct form

BÀI TẬP CÂU ĐIỀU KIỆN

(CONDITIONAL SENTENCES)

Exercise 1: Put the verbs in brackets into the correct form:

1.      If I see him , I _____ (give ) him a gift.

2.      If I had a typewriter, I _____ (type) it myself.

3.      If I had known that you were in hospital, I _____ (visit) you.

4.      You could make better progress if you _____ (attend) class regularly.

5.      If I _____ (know) his telephone number, I’d give it to you.

6.      If you _____ (arrive) ten minutes earlier, you would have got a seat.

7.      If he worked more slowly, he _____ (not make) so many mistakes.

8.      I shouldn’t drink that wine if I _____ (be) you.

9.      If I _____ (find) a cheap room, I will stay a fortnight.

10.  A lot of people _____ (be) out of work if the factory closed down.

Exercise 2: Make conditional sentences:

1.      Keep silent or you’ll wake the baby up. →If  ……………………………………………..…..………

2.      Stop talking or you won’t understand the lesson.→ If …………………………………….....….…….

3.      I don’t know her number, so I don’t ring her up.→ If …………………………………….....….……..

4.      I don’t know the answer, so I can’t tell you.→ If …………………………………………….………..

5.      We got lost because we didn’t have a map.→ If …………………………………….……..…….……

6.      Susan felt sick because she ate four cream cakes. →……………………………………………..……

7.      Without this treatment, the patient would have died. →……………………………………….….…...

8.      He lost his job because he was late every day. →………………………………………………...……

9.      Peter is fat because he eats so many chips. →……………………………………………………...…..

10.  Robert got a bad cough because he started smoking cigarettes. →………………………………..…..

Exercise 3: Use UNLESS instead of IF

EX:            If you do not study hard, you will fail the exam.

                        Unless you study hard , you will fail the exam

1.      If you do not like this one, I’ll bring you another

Unless………………………………………………

2.      If she does not hurry, she’ll be late

Unless ……………………………………………….

3.      If you are not careful, you’ll cut yourself

Unless ……………………………………………………

4.      if you had not sneezed, he wouldn’t have known that we were there.

Unless ……………………………………………………              

Exercise 4: One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them.

1.      If Lucia had been here now, she would find out the truth about her uncle’s accident.

             A                                      B                                C                D

2.      If a student takes a course on Computer Science, it will take him four years doing the course.

      A                          B                                                            C                              D

3.      Unless it did not rain, Peter would pay us a visit.

          A                 B                             C                D

4.      If had I known you were in financial difficulty, I would have helped you.

                 A                    B    C                                                 D

5.      If I had knew the time when the match started, I would have told you.

      A          B                        C                                                 D

6.      If she had finished the work, she can go home.

                        A               B                      C    D

7.      If I had spoken more confident at the interview, they would have offered me the job.

                   A                        B                                                           C                    D

8.      If we had had a map, we would not be lost yesterday.

      A            B                              C            D

9.      Had I known Alice’s address, I would write to her.

                A             B                                C           D

10.  If I had realized that the traffic lights were red, I would stop.

                    A           B                 C                                   D

11.  If had you sent the application form to that company, you would have been offered a job.

                  A                                                      B                         C                  D

12.  He spends money carelessly as if he was a millionaire.                                                                                                 

               A                        B          C          D

13.  Unless you work harder, you will be sack because of your laziness.

          A               B                               C                                        D

14.  Unless there had been the heavy storm, the climbers will not have died.

          A                    B                 C                                      D

15.  She has found that nobody can help her if she did not try her best to do it herself.

                  A                                  B                              C                        D

Exercise 6: Choose the best answer for each of the following sentences.

1.      _____have enough apples, she’ll make an apple pie this afternoon.

A.Should she                    B. If she                      C. Will she                  D. Unless she

2.      If you_____to me, you wouldn’t have got so much trouble.

A. listened                         B. would listen               C. had listened                     D. Would have listened

3.      If you don’t know how to spell a word, you_____ look it up in the dictionary.

A. must                             B. will                         C. should                     D. ought

4.      If the sun _____, we _____for a walk.

A. shines / will go             B. shone / will go        C. shone / would go    D. had shone / would go

5.      The campfire _____ if it _____ last night.

A. wouldn’t be cancelled / hadn’t rained             B. wouldn’t have been cancelled / hadn’t rained

C. would have been cancelled / hadn’t rained      D. will be cancelled / rains

6.      But for our parents, we _____ successful in life.

A. will never be                 B. would never be       C. wouldn’t have be   D. would have never been

7.      If I _____ my wallet at home this morning, I _____ money for lunch now.

A. leave / will have           B. didn’t leave / would have              C. hadn’t left / would have     D. hadn’t left / would have had

8.      It is too bad, Lam isn’t here. If he _____ here, he _____ what to do.

A. were / would know                                          B. is / will know                     

C. had been / would have known                         D. was / would know

9.      If we _____ the plans carefully, we would not have had so many serious mistakes.

A. study                B. had studied                        C. studied                   D. were studying

10.  I will never talk to you again _____ you apologize me _____ your being rude.

A. if / for               B. unless / for              C. or / of                      D. whether / or

11.  _____ if you work harder, you will be sacked.

A. Whether           B. If                            C. However                 D. Unless

12.  I think you should stop smoking.

A. If I am you, I will stop smoking.         B. If I were you, I will stop smoking.

C. If I were you, I would stop smoking.  D. If I had been you, I would stop smoking.

13.  If you take the ice out of the fridge, it _____.

A. vaporizes          B. melts                       C. heats                       D. disappears

14.  We should do something to protect water from being polluted _____we will have nothing to drink in the future.

A. if                       B. whether                  C. or                            D. unless

15.  Let’s knock on their door to see _____ home.

A. if they’re                      B. unless they’re                     C. whether they were              D. if they were

16.  Unless we _____  more snow, we can’t go skiing.

A. will have                       B. have                                    C. have had                             D. had

17.  You’ll fail the exam _____ you start revising.

A. if                                   B. until                                    C. when                                   D. unless

18.  Unless you wash the car, you _____ not drive it at the weekend.

A. would                           B. could                                  C. have to                                D. may

19.  If Peter _____ his car before the drive, he _____ the problem of out of petrol.

A. checked / will not get                                       B. had checked / would not have got

C. checks / will not have got                                             D. would be checking / will not have got

20.  He stepped on the mine, and it exploded.

1. If he doesn’t step on the mine, it doesn’t explode.
2. If he doesn’t step on the mine, it won’t explode.
3. If he didn’t step on the mine, it wouldn’t explode.
4. If he hadn’t stepped on the mine, it wouldn’t have exploded.

21.  In my experiments, the liquid is cooled to 32­­­ºF. It always freezes.

1. If you cool the liquid to 32 degrees, it froze.
2. If you cooled the liquid to 32 degrees, it would freeze.
3. If you cool the liquid to 32 degrees, it will freeze.
4. If you had cooled the liquid to 32 degrees, it would have frozen.

22.  It may rain this afternoon. I hope it doesn’t because I don’t want the match to be cancelled.

      A. If it rains, the match is cancelled.                    B. If it rains, the match will be cancelled.

C. if it rained, the match would be cancelled.      D. If it had rained, the match would have been cancelled.

23.  Unfortunately, I don’t know Philosophy, so I can’t answer your question.

1. If I know Philosophy, I can answer your question.
2. If I know Philosophy, I will be able to answer your question.
3. If I knew Philosophy, I would be able to answer your question.
4. If I had known Philosophy, I would have been able to answer your question.