Modal verbs: Can - must - should

You ___ drink water every day.

• mustn't

• should

• can't

• shouldn't

You ___ eat too much junk food.

(junk food: Đồ ăn nhanh)

• must

• can

• shouldn't

• should

You ___ share your toys with your friends.

• shouldn't

• musn't

• can't

• should

They ___ wear helmets when riding bikes.

• shouldn't

• must

• can't

• mustn't

You ___ help your friends when they need it.

• must

• can't

• mustn't

• shouldn't

We ___ forget to do our chores.

(Chore: Việc nhà; forget: Quên)

• can

• shouldn't

• mustn't

• must

The traffic light is red. We ___ stop.

• must

• can

• shouldn't

• will

We ___ leave the house without locking the door.

(leave: Rời đi; without: Mà không)

• should

• must

• can

• shouldn't

You ___ stay near the fire.

(fire: Lửa)

• should

• can

• shouldn't

• must

You ___ always tell the truth.

(truth: Sự thật)

• shouldn't

• can

• must

• can't