UNIT 11 – GRAMMAR
1st conditional sentence (Câu điều kiện loại 1)
1. Form
If clause Main clause
(+) If + S +V(s/es), S + will/ can/ may + V-inf
2. Use
Dùng để diễn tả một hành động hoặc một tình huống có thể xảy ra trong tương lai nếu
điều kiện ở mệnh đề chính được thỏa mãn.
Ví dụ:
If he tries much more, he will improve his English.
(Nếu anh ấy chăm chỉ hơn nữa, anh ấy sẽ cải thiện được vốn tiếng Anh của anh ấy.)
If you don’t study hard, you will fail the exam.
(Nếu bạn không học hành chăm chỉ, bạn sẽ trượt kỳ thi.)
3. Practice:
a. Put the verbs in brackets into the correct tenses.
1. If I see him, I (give) him a lift.
2. The table will collapse if you (stand) on it.
3. If he (eat) all, he will be full.
4. If I find your passport, I (telephone) you at once.
5. The police (arrest) him if they catch him.
6. If he (read) in bad light, he will ruin his eyes.
7. Someone (steal) your car if you leave it unlocked.
8. What will happen if my parachute (not open) ?
9. If he (wash) my car, I’ll give him $10.
10. If she (need) a radio, she can borrow me.
b. Put the verbs in brackets into the correct form.
1. We ____________ (stay) at home if it rains.
2. She will call you if she ____________ (have) time.
3. If it _________ (not rain) tomorrow, we will go for a picnic.
4. If everyone _______(recycle) paper, metal and glass, we _____ (not produce) so
much rubbish.
5. If you ________ (not water) plants, they ________ (die).
6. If the weather __________ (be) bad, we ________ (not go) to the park.
7. We _____ (save) thousands of trees if we _______ (not waste) so much paper.
8. What _______ (happen) if we _______ (keep) polluting the environment.
9. If we ________ (not stop) cutting down so many trees, we ______ (endanger) our
oxygen supply.
10.If people ________ (dump) chemicals into rivers, they _______ (not be) able to
swim in them in the future.
c. Complete the sentences with the correct form or tense of the verbs in brackets.
1. If people share their cars to go to work, there ____ (not be) so many car fumes.
2. I _______ (study) here for more than three years.
3. What a nice dress! Where ________ (you/ buy) it?
4. Don’t forget to take your umbrella. It _________ (rain).
5. If we _____ (recycle) paper products, we _________ (save) more trees.
6. Our class ______(organise) a writing contest. We have to write about the
environment.
7. Give old clothes to charity instead of ________ (throw) them away.
8. Encouraging people ____ (use) public transport is a great way to reduce traffic jams.
d. Find the mistake in the four underlined parts A, B, C or D of each sentence.
1. If someone came into the store, smile and say, “May I help you?”
A B C D
2. If you try these cosmetics, you look five years younger.
A B C D
3. If you do not understand what were written in the book, you could ask Mr. Pike.
A B C D
4. I will come to meet Mr. Pike and tell him about your problems if you didn’t solve A
B C D
them yourself.
5. Sam will not graduate unless he doesn’t pass all the tests.
A B C D
6. If there isn’t enough food, we couldn’t continue our journey.
A B C D
7. Unless you pour oil on water, it will float.
A B C D
8. You have to take a taxi home if you want to leave now.
A B C D
9. If anyone will phone, tell them I’ll be back at 11:00.
A B C D
10.We can hire a mini bus if there will be enough people.
A B C D
e. Decide if each sentence is right or wrong and correct wrong sentences.
Correction
1. If Peter has a flat, he will not live with his parents. ________________
2. If Mary does not invited me, I won’t go to her party. ________________
3. Tom will pass the driving exam if he will not be nervous. ________________
4. If I know his email address, I will send him an invitation. ________________
5. I will go to the supermarket tomorrow if I am busy. ________________
6. Leave me alone and I will call the police. ________________
7. I will tell you if you ask me. ________________
8. Unless I don’t have enough money, I won’t buy a car. ________________
9. Don’t forget your watch or we miss the plane. ________________
10. I won’t bring my credit card, so I don’t buy anything at the
________________
mail.
11. If you ask Tom for the car, he would lend it to you. ________________
12. Don’t miss the party or you will not have another chance
________________
to meet your friends.
13. If he will train every day, he will be a good runner. ________________
14. Leave home early so you will miss the bus. ________________
15. If Mary’s operation tomorrow fails, she will never be able
________________
to walk again.
