MUST / HAVE TO......

Publié le 22 Juin 2013

Must et Have to :

Must et Have to exprime tout les deux une obligation mais il y a une différence entre les deux.

Must : est utilisé pour une obligation personnelle , quelque chose que l'on s'impose à soi-même

Exemple: I must send a postcard to my sister because i haven’t written to her for so long.

Must not : exprime l'interdiction

Exemple: They must not shout in the classroom . It's forbidden.

Have to / Has to : lorsque l’obligation est déjà présente , qu’elle est imposée de l’extérieur

Exemple: i can’t meet you, i have to work

i have to be at the office at 9 .00 A.M.

Don't / Doesn't have to: est utilisé lorsqu'il n'y a pas d'obligation:

Exemple: They don't have to wear a tie at school.

Recapitulatif:

Obligation, contrainte, ordre

( forme affirmative)

MUST

You must listen to your parents

Interdiction

MUSTN’T

You mustn’t shout in the classroom

Probabilité très forte

( déduction)

MUST

She didn’t come to school, she must be sick

Obligation

(imposée par l’extérieur)

HAVE TO

Si ce n‘est pas une obligation

( imposée)

DON’T HAVE TO

I have to be at the office at 9.A.M.

You don’t have to a skirt to work.

En ce qui concerne l’obligation et l’interdiction MUST n’existe qu’au présent pour les autres temps on utilise Have to.

Exemple:

I had to be at the office at 9.00 A.M.

i will have to be at the office at 9.A.M. tomorrow

Exercices d’application : compléter avec MUST, HAVE TO, HAS TO, DON'T HAVE TO ......

1. You really…………………….. work harder if you want to pass the examination

2. Jenny ………………………………. To wear glasses

3. I can’t come tomorrow. I …………………………….work late

4. The car has broken down, we ………………………………. Take it to the garage

5. Peter became ill last night, we …………………………. Call the doctor

6. You ………………………………. Forget what i told you. It’s very important.

7. We ………………………………… leave now. W’ve got plenty of time.