1. We will plant more trees. The air will be fresher.
If we plant more trees, the air will be fresher.
2. We will use fewer cars. We will reduce pollution.
If we use fewer cars, we will reduce pollution.
3. We will cycle to school every day. We will keep fitter.
If we cycle to school every day, we will keep fitter.
4. We will use recycled products. We will save money.
If we use recycled products, we will save money.
5. People will throw rubbish into the right bin. They will keep the environment clean.
If people throw rubbish into the right bin, they will keep the environment clean.
6. We will turn off the tap when brushing the teeth. We will save a lot of water.
If we turn off the tap when brushing the teeth, we will save a lot of water.
7. People will travel more by public transport. The harmful gases in big cities will be reduced.
If people travel more by public transport, the harmful gases in big cities will be reduced.
8. We will start at six. We will arrive there before noon.
If we start at six, we will arrive there before noon.
9. The boy eats so may green apples. He will be ill.

If the boy eats so may green apples, he will be ill.

10.We will use reusable bags for shopping. We will reduce waste.

=> If we use reusable bags for shopping, we will reduce waste.

If Mike fails his exams, his dad will be angry. 

Our teacher will be happy if we tidy our desks. 

If the sun shines, we will go to the lake. 

If my mum does not come home soon, I will cook the dinner. 

We will cross the Atlantic if we sail to New York. 

I will not have a good time if my friends are not at the party. 

If we stayed in the same hotel , we could share a room

1. Plastic food packaging causes plastic pollution. Food packaging can't be eaten.

(Bao bì thực phẩm bằng nhựa gây ô nhiễm nhựa. Bao bì thực phẩm không thể ăn được.)

If-clause first: If food packaging could be eaten, we would reduce plastic pollution.

(Nếu có thể ăn được bao bì thực phẩm, chúng ta sẽ giảm thiểu ô nhiễm nhựa.)

If-clause last: We would reduce plastic pollution if food packaging could be eaten.

(Chúng ta sẽ giảm ô nhiễm nhựa nếu có thể ăn được bao bì thực phẩm.)

2. We can't compost plastic. Plastic ends up in landfills and oceans.

(Chúng tôi không thể ủ nhựa. Nhựa cuối cùng ở trong các bãi rác và đại dương.)

If-clause first: If we can’t compost plastic, it will end up in landfills and oceans.

(Nếu chúng ta không thể ủ nhựa, cuối cùng nó sẽ ở các bãi rác và đại dương.)

If-clause last: If we couldn’t compost plastic, it would end up in landfills and oceans.

(Nếu chúng ta không thể ủ nhựa, nó sẽ kết thúc ở các bãi rác và đại dương.)

3. We use lots of energy and water to grow food. Scientists can't make food in their labs yet.

(Chúng ta sử dụng nhiều năng lượng và nước để trồng thực phẩm. Các nhà khoa học chưa thể tạo ra thực phẩm trong phòng thí nghiệm của họ.)

If-clause first: If scientists could make food in their labs, we wouldn't use lots of energy and water to grow food.

(Nếu các nhà khoa học có thể tạo ra thực phẩm trong phòng thí nghiệm của họ, chúng ta sẽ không sử dụng nhiều năng lượng và nước để trồng thực phẩm.)

If-clause last: We wouldn't use lots of energy and water to grow food if scientists could make food in their labs.

(Chúng ta sẽ không sử dụng nhiều năng lượng và nước để trồng thực phẩm nếu các nhà khoa học có thể tạo ra thực phẩm trong phòng thí nghiệm của họ.)

4. We use lots of plastic. There's lots of trash.

(Chúng ta sử dụng rất nhiều nhựa. Có rất nhiều rác.)

If-clause first: If we use less plastic, there will be less trash.

(Nếu chúng ta sử dụng ít nhựa hơn, sẽ có ít rác hơn.)

If-clause last: There will be less trash if we use less plastic.

(Sẽ có ít rác hơn nếu chúng ta sử dụng ít nhựa hơn.)

X. Write the first conditional sentences using the cues given.

1. If/ Sue/ not hurry/ she/ miss/ the bus

=> If Sue doesn't hurry,she will miss the bus.

2. Rita/ pass/ the exam/ if/ she/ study/ hard

=> If Rita studies hard,she will pass the exam.

3. If/ he/ watch/ too much television/ he/ hurt/ his eyes

=> If he watches too much television,he will hurt his eyes.

4. If/ it/ not be/ sunny/ tomorrow/ we/ not go/ to the beach

=> If it doesn't sunny,we will not go to the beach tomorrow.

5. We/ visit/ her/ if/ we/ have/ time

=> We will visit her, if we have time.

6. I/ not wait/ if/ you/ arrive/ late

=> I will not wait if you arrive late.

7. They/ not play/ tennis/ tomorrow/ if/ it/ rain

=> They will not play tennis tomorrow if it rains.

8. If/ you/ not see/ your alarm clock/ you/ not wake up/ on time

=> If you don't set your alarm clock, you will not wake up on time.

1.We will visit her if we have time

2. I will not wait if you arrive late.

3.They will not play tennis tomorow if it is rain

4. If you do not see your alarm clock, you will not wake up on time

Write sentences in the first or second conditional

1. she/ finish her tomorrow/ go to the beach

-> She will finish her tomorrow before going to the beach

Exercise 9: Write a suitable conditional sentences for the following situations .

1. Working so much will make you tired.

⇨       If you ………work so much, you will be tired………….

1. We didn’t visit the museum because we didn’t have time.

⇨       We would ……have visited the museum if we had had time……………..

2. People don’t do enough exercise, so there are a lot of heart diseases.

⇨       If people ……did enough exercise, there would not be a lot of heart diseases…………………..

3. Without you, I would have given up  it years ago.

⇨       If it hadn’t been ……for you, I would have given up  it years ago.………………….

4. It was overeating that caused his heart attack

⇨       If ………he had not overeaten, he would not have had his heart attack……………………………..

5. Keeping calm is the secret of passing your driving test.

⇨       As long as …………you keep calm, you will pass your driving test………………………………

6. We couldn’t have managed without my father’s money.

⇨       If it ………had not been for my father's money, we couldn't have managed……………………………………………..

7. Without his help we would all have died.

⇨       If it ……had not been for his help, we would all have died.…………………………………………………….

8. If it doesn’t rain soon, millions of pounds’ worth of crops will be lost

⇨       Unless ………it rains soon, millions of pounds’ worth of crops will be lost…………………………………………………….

9. It was the goalkeeper who saved the match for us.

⇨       If it hadn’t …………been for the goalkeeper, ther would have been no one saved the match for us………………………………….

10. The only reason the party was a success was that a famous film star attended.

⇨       Had it not ……………been for the attendance of the famous film star, the party would not have been a success…………………………………..

11. Sally might not bring her camera to the party, so I’ll take mine.

ð I’ll take my camera to the party in case……Sally might not bring her camera to the party……………

2 I didn't go by train because the ticket was so expensive.

(Tôi không đi tàu hỏa vì vé quá đắt.)

Đáp án: If the ticket hadn't been so expensive, I would have gone by train.

(Nếu vé không quá đắt, tôi đã đi bằng tàu hỏa.)

3 I didn't meet you at the airport because I didn't know when you were arriving.

(Tôi không gặp bạn ở sân bay vì tôi không biết khi nào bạn đến.)

Đáp án: If I had known when you were arriving, I would have met you at the airport.

(Nếu tôi biết khi bạn đến, tôi sẽ gặp bạn ở sân bay.)

4 We stopped at the service station because we were nearly out of petrol.

(Chúng tôi dừng lại ở trạm dịch vụ vì chúng tôi gần hết xăng.)

Đáp án: If we hadn't been nearly out of petrol, we wouldn't have stopped at the service station.

(Nếu chúng tôi không gần hết xăng, chúng tôi sẽ không dừng lại ở trạm dịch vụ.)

5 I wasn't late for the meeting because I took a taxi.

(Tôi không bị trễ cuộc họp vì tôi đã đi taxi.)

Đáp án: If I hadn't taken a taxi, I would have been late for the meeting.

(Nếu tôi không đi taxi, tôi sẽ bị trễ cuộc họp.)

6 I bought the tickets on the train because there wasn't a ticket office at the station.

(Tôi đã mua vé trên tàu vì không có phòng vé ở nhà ga.)

Đáp án: If there had been a ticket office at the station, I wouldn't have bought the tickets on the train.

(Nếu có một phòng bán vé ở nhà ga, tôi sẽ không mua vé trên tàu.)