Điền dạng đúng của động từ 1. If she ....................(work) hard, she .....................(pass) the exam. 2. If I ..................(come) soon, I ....................(phone) you. 3. She ...................(feel) sad if you ....................(not, give) her a gift. 4. If Peter ......................(go) to work late again, he .................(be) sacked. 5. No one .........................(know) the truth if you ................(not, reveal) 6. If the boy ....................(eat) that apple, he ....................(be) ill. 7. If you .....................(not, hurry), you .....................(miss) the bus. 8. Tell him about this story if you .........................(see) him. 9. If you ..........................(have) a day off where you..............(go)? 10. If he ..................(cook) the meal himself, help him. 11. If few people .....................(come) to the meeting, please postpone to the other day. 12. If it .......................(not, be) warm this afternoon, we ...................(put off) the game. 13. Your father ...............(pick) you up if you ..................(come) back late? 14. What you ..................(speak) if you ....................(meet) a foreigner? 15. Unless he .................(answer) all my questions, I ...................(not, help) him.  Viết lại câu không đổi nghĩa 1. Turn off all the lights and you will not pay more money.->If ...................................................................... 2. Unless she wears warm clothes, she will have a cold. -> If ................................................................................ 3. Be careful or you may have an accident. -> If .......................................................................................................... 4. phone your parents or you have a trouble. -> If ......................................... 5. Unless she whispers, everyone knows what she is saying. -> If ........................................................................ 6. Stay here and you will feel save. -> If ............................................................. 7. Pay electricity bill today or your electricity will be cut off. -> If ................................................................. 8. Stop smoking otherwise your cough may be worse. -> If ................................................... 9. Unless we use less fossil fuel, they will be run out soon. -> If ........................................................ 10. Unless it stops raining today, we may be faced with a serious flood. -> If ........................................................ 11. Do morning exercises regularly, your body will be fitter.-> If .................................................... 12. Unless we renewable energy, we will have nothing for the future generation. -> If ............................................ 13. The climate will change unless we reduce the use of non-renewable energy. -> If ........................................ 14. Lock all the doors and noone can break into your house. -> If ........................................... 15. Unless we continue hunting polar bears, they will become extinct in near future. -> If .........................................  Cho dạng đúng của động từ trong ngoặc 1. If It (not rain) ………today, they ( go)…………camping. 2. Peter (play) ………soccer with his friends if he (have) …….free time. 3. If Jane (study) ………..harder, she (pass) …………….the entrance exams. 4. David (come and see) ……………….his girlfriend if he (not have to/work) ……..on a night shift. 5. This machine (break) ……..down if it (not use) ……..quite often. 6. Helen (come)…….. to class late if she (not run)…………….fast enough. 7. Giang’s parents (be)……..very happy if she (get) ……….good marks at school. 8. Thomas (visit) …….Ha Long Bay if he (earn) ……enough money. 9. If you (brush) ….your teeth regularly, you ( not have)……….a toothache. 10. If Carol (have) ….enough qualifications for the job she applied, she ( get) ……..it.  Bài tập biến đổi Unless = if …….not. 1. If Andrew is not lazy, he will pass the final examination. (unless) →………………………………………………………………………………………… 2. John will not catch the train unless he runs more quickly. (If) →………………………………………………………………………………………… 3. The tree will die if it isn’t watered every day. (unless) →………………………………………………………………………………………… 4. Life won’t be very easy if we don’t earn lots of money. (unless) →………………………………………………………………………………………… 5. If you don’t practice more often, your English won’t be better. (unless) →………………………………………………………………………………………… 6. Jack will be dismissed if he doesn’t try to work harder. (unless) →…………………………………………………………………………………………