Use "Unless" instead of "If" and versa:

7. No one can help him if he doesn't tell the truth.

-> Unless ____________________________________

8. You will catch a cold unless you keep your feet dry.

-> If _________________________________________

9. Unless he phoned immediately, he wouldn't meet Mary.

-> If __________________________________________

Use "Unless" instead of "If" and versa:

4. Unless he had drunk alcohol, he would have passed the contest.

-> If __________________________________________________

5. You'll lose your job if you don't change your attitude and become friendlier.

-> Unless ______________________________________________

6. These flowers will die if nobody waters them.

-> Unless _______________________________________________

Use "Unless" instead of "If" and versa:

1. If he doesn't hurry, he'll be late for school.

-> Unless __________________________________

2. Unless it stops raining, we won't go out.

-> _________________________________________

3. Unless he studied harder, he would fail the final exam.

-> If ________________________________________

IV. FACT IN THE PAST -> IF CLAUSE (TYPE 3)

6. I didn't phone you because I was very busy.

=> If..................................................................

7. I didn't have an umbrella and so I got wet in the rain.

=> If...................................................................

8. Peter was very nervous and so he failed the driving test.

=> If.........................................................................

9. I didn't take a taxi because I didn't have any money on me.

=> If...........................................................................

10. She didn't have a visa, that's why she couldn't have come to that country.

=> If.................................................................................

IV. FACT IN THE PAST -> IF CLAUSE (TYPE 3)

3. We got lost because we didn't have a map.

-> If.....................................................................

4. We stayed up late last night and we were so tired.

-> If......................................................................

5. He wasn't able to answer the questions, so he failed the exam.

-> If.......................................................................