Question

Write positive and negative sentences, using "must/mustn't". 1. Drivers/drive/on the right-hand side of the road. 2. You/drive/after/you/drink alcohol. 3. Small children/sit/in the front seat of the car. 4. Vehicle/have/seats/for small children. 5. Drivers and passengers of motorcycles/wear helmets. 6. You/drive/at more than 50 km/on this road. 7. You/use/a mobile phone/when you are driving.

Answer 1

1. Drivers must drive on the right-hand side of the road.

2. You mustn't drive after you drink alcohol.

3. Small children mustn't sit in the front seat of the car.

4. Vehicles must have seats for small children.

5. Drivers and passengers of motorcycles must wear helmets.

6. You mustn't drive at more than 50 km/h on this road.

7. You mustn't use a mobile phone when you are driving.

Answer 2

Positive sentences using "must":

1. Drivers must drive on the right-hand side of the road.
2. You must not drive after you drink alcohol.
3. Small children must not sit in the front seat of the car.
4. Vehicles must have seats for small children.
5. Drivers and passengers of motorcycles must wear helmets.

Negative sentences using "mustn't":

1. Drivers mustn't drive on the left-hand side of the road.
2. You mustn't drive after you drink alcohol.
3. Small children mustn't sit in the front seat of the car.
4. Vehicles mustn't lack seats for small children.
5. Drivers and passengers of motorcycles mustn't neglect wearing helmets.

Note: The word "mustn't" is a contraction of "must not," which is used to express prohibition or something that is not allowed. The positive sentences using "must" indicate an obligation or a requirement.