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Modal Verbs: Must/mustn't Must

The document discusses modal verbs such as have to, must, and mustn't. It explains that modal verbs are used differently than normal verbs, with no "s" added for third person singular and questions formed by inversion. It provides examples of affirmative, negative, and interrogative forms for have to/don't have to and must/mustn't. Specifically, it states that have to is used for something necessary or obligatory, while must is also used for obligations. Don't have to and mustn't refer to things that are not necessary or prohibited, respectively.

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79 views1 page

Modal Verbs: Must/mustn't Must

The document discusses modal verbs such as have to, must, and mustn't. It explains that modal verbs are used differently than normal verbs, with no "s" added for third person singular and questions formed by inversion. It provides examples of affirmative, negative, and interrogative forms for have to/don't have to and must/mustn't. Specifically, it states that have to is used for something necessary or obligatory, while must is also used for obligations. Don't have to and mustn't refer to things that are not necessary or prohibited, respectively.

Uploaded by

Mirela Chirvăsuță
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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The 19th of May, 2020

 Had to Modal verbs


Have to=> had to (past)
Examples of modal verbs: can, could, have to, must, should etc.

Modal Affirmative form: from normal verbs:


verbs are different
I/you/he/she/it/we/you/they had to work yesterday.
1. They don’t use an ‘s’ for the third person singular (he/she/it)
2. They make questions by inversion. (‘she can go’ becomes ‘can she go?’)
Negative form:
3. They are followed directly by the infinitive of another verb (without
I/you/he/she/it/we/you/they didn’t have to work yesterday.
‘to’ : I can to run)

Interrogative form:
 Have to/ don’t have to
Did I/you/he/she/it/we/you/they have to work yesterday?
-we use have to for something that is necessary to do or that we
are obliged to do
 Must/mustn’t
e.g. I have to study for two hours every evening.
-we use don’t/doesn’t have to for an action that isn’t necessary.
Must + verb – to talk about obligations
e.g. He doesn’t have to work on Sundays.
e.g. Students must be at school at 8:45.
Affirmative form Negative form Interrogative form
Mustn’t
I have+verb – something
to run. is prohibited
I don’t have to run.(interzis)
Do Ior notto
have allowed.
run?
You have to run. You don’t have to Do you have to run?
e.g. You mustn’t talk in the library. run.
He/She/ It has to He/ She/ It doesn’t Does he/she/it have
run. have to run. to run?
We havedon’t
 Mustn’t/ to run.
have to We don’t have to Do we have to run?
Mustn’t -> to talk about something run. that is not allowed
You have
Don’t have to run.
to-> You don’t
to talk about have tothatDo
something younecessary
is not have to run?
to do.
run.
They have to run. They don’t have to Do they have to
e.g. You mustn’t take your phone into
run. the exam. run?
You don’t have to answer all the questions.

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