Exercises: modal verbs of obligation

Ejercicios de verbos modales: expresión de obligación III

Elige la opción correcta entre 'need to' y 'ought to'.

1 They finish this now, they can do it tomorrow.

They needn't finish this now, they can do it tomorrow.

2 Politicians to quit lying, tell the truth and show more respect for the public's right.

Politicians need to quit lying, tell the truth and show more respect for the public's right.

3 He camp in this forest. It's forbidden.

He oughtn't camp in this forest. It's forbidden.

4 I don't mind at all. You apologize.

I don't mind at all. You needn't apologize.

5 Nobody smoke in a kidgarden.

Nobody ought to smoke in a kidgarden.

6 we have gone to the supermarket?

Needn't we have gone to the supermarket?

7 Sam drink so much.

Sam ought not drink so much.

8 What did you do? You have a haircut.

What did you do? You needn't have a haircut.

9 He got eye hurt and headache. He have sat so close to the TV.

He got eye hurt and headache. He oughtn't have sat so close to the TV.

10 at least consider going to your cousin's house?

Ought we not at least consider going to your cousin's house?