Exercises: modal verbs of obligation

Ejercicios de verbos modales: expresión de obligación I

Completa las oraciones con must y mustn't (must not), según corresponda.

1 She (walk) alone at night in this city.

She mustn't (must not) walk alone at night in this city.

2 (You / not speak) at class.

You mustn't (must not) speak at class.

3 He (not sit) longer in the snow.

He must not (mustn't) sit longer in the snow.

4 You (not drive) so fast through the village.

You mustn't (must not) drive so fast through the village.

5 Peter (tell) his parents he´s going abroad.

Peter must tell his parents he´s going abroad.

6 My watch (be) broken. It's stopped.

My watch must be broken. It's stopped.

7 In offering a critique, (you / be) honest and kind?

In offering a critique, must you be honest and kind?

8 John (not / trust) his wife, she's lying to him.

John mustn't (must not) trust her wife, she's lying to him.

9 Laws (be) respected.

Laws must be respected.

10 He (stop) smoking.

He must stop smoking.