We can use a model verb (must, can, may, might or should) in the main clause of a comditional type 1 sentence. If + Present Simple, must/can/may/might/should + infinitive without to If we want to keep fit, we must eat a balanced diet. You can improve your mood if you usually socialise with your friends. If he practises football every day, he may/might join the school team. We shouldn’t eat junk food if we want to lose weight.

Tạm dịch:

Chúng ta có thể sử dụng động từ mẫu (must, can, may, might hoặc nên) trong mệnh đề chính của câu điều kiện loại 1. If + Hiện tại đơn, must/can/may/might/ Should + nguyên mẫu không có to Nếu chúng ta muốn giữ dáng, chúng ta phải ăn một chế độ ăn uống cân bằng. Bạn có thể cải thiện tâm trạng của mình nếu thường xuyên giao lưu với bạn bè. Nếu anh ấy tập bóng đá hàng ngày, anh ấy có thể/có thể tham gia đội tuyển của trường. Chúng ta không nên ăn đồ ăn vặt nếu muốn giảm cân.

1. Match the if-clause (1-6) to the main clauses (a-f) to make meaningful sentences.

(Nối mệnh đề if (1-6) với mệnh đề chính (a-f) để tạo thành câu có nghĩa.)

If you want to strengthen your muscles, (1)                           (a) you might not win the final match.

If you want to manage your weight, (2)                                             (b) you can feel energetic the next day.

If you get enough sleep, (3)                                                                (c) you must practise hard every day.

If you only practise tennis once a week, (4)                           (d) you should life weights regularly.

If you don’t want to be tired, (5)                                                        (e) you can’t eat too much junk food.

If you plan to win the football match, (6)                               (f) you shouldn’t stay up late the night before.

Choose the best answer.

If you don’t want to go out tonight, you _____ stay at home to watch TV.

Choose the best answer.

You _______ at least call or send him a message to ask for his permission if you want to use his car.

Choose the best answer.

 If you ____ a choice, which country will you visit?

Choose the best answer.

Trees won’t grow _____ there is enough water.

Choose the best answer.

If I feel hungry in the afternoon, I _____ snacks like fresh carrots, a bottle of milk or a slice of bread.

Choose the best answer.

_______ you wear warm clothes, you _______ have a cold.

Choose the best answer.

You should ____ up smoking ____ you will get ill.

Choose the best answer.

If you  _______ fewer calories than you burn, you _____ lose weight.

Choose the best answer.

You _____ put some sunscreen on your skin ______ you want to prevent it from the harmful effects of the sun. 

Choose the best answer.

If people work so much, they _____ depressed and eat more food containing a lot of fat and sugar rather than minerals and vitamins.

Choose the best answer.

_____ the chicken with almonds makes your dish more ________.

Choose the best answer.

If you ______cook food yourself, you _____ have a bowl of cereal and some milk.

Choose the best answer.

Add a _____  of mixed herbs and you _______have a much more delicious dish.

Choose the best answer.

- Would you mind if we _____ you by your first name?

- Not at all. Please call me Tom.

Choose the best answer.

If we took the 10:30 train, ______ too early.

Choose the best answer.

If he________exercises, he________play soccer.

Choose the best answer.

If you ________ enough sleep, you ________ a headache.

Choose the best answer.

If water is heated to 100^oC, it________to steam.

Choose the best answer.

I   ____ the police unless you ______

Choose the best answer.

__________more help, I will call my neighbor.

Choose the best answer.

Unless you __________all of my questions, I can’t do anything to help you.

Choose the best answer.

You won't pass the examination_____ you study more.  

Choose the best answer.

_____ the boat leaves on time, we will arrive in Paris by the morning.

Choose the best answer.

We're going to start painting the house tomorrow_____ it's not raining.  

Choose the best answer.

George won't lend you any money_____ you promise to pay him back.  

Grammar

Modal verbs in first conditional sentences

(Động từ khuyết thiếu trong câu điều kiện loại 1)

1. Write the correct form of each verb in brackets.

(Viết dạng đúng của mỗi động từ trong ngoặc.)

1. If Mai (not want) _______ to gain weight, she shouldn't eat much fast food.

2. If you stay up too late tonight, you might (feel) _______ tired tomorrow morning.

3. You should (sleep) _______ eight hours a night if you want to be awake and fully alert.

4. If Tom (complete) _______ his assignment on Friday, he can go out with his friends at the weekend.

5. You must (be) _______ careful if you don't want to get burnt.

2. Circle the correct modal verbs to complete the following sentences.

(Khoanh tròn các động từ khiếm khuyết đúng để hoàn thành các câu sau.)

1. She can / should go home early if she finishes her work.

2. If you train hard, you might / shouldn't win the first prize.

3. If they don't want to be punished, they must / may follow the rules.

4. If students have an upcoming exam, they shouldn't / can't wait to study until the day before it.

5. If you're having a bad day, you should / may do your best to get through it.

3. Match the first half of the sentence in A with the second half in B.

(Nối nửa đầu câu ở A với nửa sau ở B.)

4. What will you say in each situation below? Use first conditional sentences with modal verbs.

(Bạn sẽ nói gì trong mỗi tình huống dưới đây? Sử dụng câu điều kiện đầu tiên với động từ khiếm khuyết.)

1. Your friend wants to lose weight. You advise him/her to eat less high fat food and do more exercise.

(Bạn của bạn muốn giảm cân. Bạn khuyên anh ấy/cô ấy nên ăn ít đồ ăn nhiều chất béo và tập thể dục nhiều hơn.)

2. Your friend invites you out for an ice cream, but it's possible that you will have a sore throat.

(Bạn của bạn mời bạn đi ăn kem nhưng rất có thể bạn sẽ bị đau họng.)

3. Your roommate often stays up late at night. You think it is necessary to get enough sleep every night; otherwise, his health will suffer.

(Bạn cùng phòng của bạn thường xuyên thức khuya. Bạn cho rằng cần phải ngủ đủ giấc mỗi đêm; nếu không, sức khỏe của anh ta sẽ bị ảnh hưởng.)

4. Your little brother wants to go for a swim. You agree but ask him to finish all his homework first.

(Em trai của bạn muốn đi bơi. Bạn đồng ý nhưng yêu cầu em làm xong bài tập về nhà trước.)

5. You're able to make a delicious pizza when you have all the needed ingredients.

(Bạn có thể làm một chiếc bánh pizza ngon khi có đủ nguyên liệu cần thiết.)

5. Complete the sentences with your own ideas using the modal verbs you have learnt.

(Hoàn thành các câu với ý tưởng của riêng bạn bằng cách sử dụng các động từ khiếm khuyết bạn đã học.)

1. If you spend too much time playing computer games, ...

2. If you want to get a good night's sleep, ...

3. If you don't feel well, ...