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MUST

MUST is used to expres STRONG NECESSITY

You must carry your passport everywhere you go.

You must learn some useful phrases in the language of the country you visit

MUST is used to express RULES and REGULATIONS

You must follow the rules inside the swimming pool .

You must wait for your turn to use the treadmill at the gym.

MUST + verb (simple form)

You must  help customers whenever you can.

She must wear her ID inside the congress premises

NEGATIVE

You must not feed the fish in the aquarium.

You mustn't go into the ocean if there are strong winds

Negative: Must Not
contraction:Mustn't

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MUST - English Modal Verb - Meaning and Examples

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HAVE TO

HAVE TO is used to express STRONG NECESSIT

You have to be careful with your key card.

All staff members have to follow safety rules.

Miguel has to organise the security staff.

HAVE/HASTO  + verbs (simple form)

I have to place my valuables in the safe deposit box.

You have to tell the front desk clerk if you are carrying a laptop, jewelry or any other valuable things

She/He has to be careful at night.

We have to read the safety  recommendations at the hotel.

NEGATIVE

In the negative it means that something is NOT NECESSARY.

You don't have to go to the restaurant. You may ask for room service.

He doesn't have to drive, Everything is at wal long distance.

We use the auxiliary DO to form the negative    DON'T HAVE TO
DOESN'T HAVE TO.

INTERROGATIVE

Do we have to attend all the conferences?

No, you don't. You just have to attend two of them.

Does she have to register all her valuables?

Yes, she does. She has to register her laptop, camera and jewelry,

We use the auxiliary DO to form the interrogative:

DO +SUBJECT +HAVE TO

DOES. + SUBJECT (THIRD PERSON SINGULAR) + HAVE TO

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SHOULD AFFIRMATIVE

Should means¨This a good idea .This is a good advice¨

He doesn't like crowded places. He should stay in a quiet beach.

Miguel is stressed by work .He should get assistant.

Notice that SHOULD is always followed by the simple form of the verb.

I + Should+verb (simple form).

You+Should +verb (simple form).

He+Should +verb (simple form).

She+Should +verb (simple form).

It+Should+verb (simple form).

we + Should +verb (simple form).

They+Should +verb (simple form).

NEGATIVE

You should out (should,t) go out without planning your holidays

Miguel should not (should´t)work under stress. He will get sick

Negative: Should NOT
Contraction: Shouldn't

INTERROGATIVE

We use the interrogative form to ask for advice

should we visit Tulum or Chiche Itza?

Should Laura get more interns to help her?

Should+ I + verb(simple form)

Should + You + verb(simple form)

Should + He + verb(simple form)

Should + She + verb(simple form)

Should + It + verb(simple form)

Should + We + verb(simple form)

Should + They + verb(simple form)

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How to Use Should in English - English Modal Verbs

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May

May is used to express PERMISSION

You may go for lunch when the press conference finishes.

You may take pictures inside the conference room.

May expresses POSSIBILITY

Laura may take a day off affter the congress is over.

Linda is prepared to take her french test so she may get certified.

May +verb (simple form)

You may carry your cellphone to the presentations.

She/He/may take the speakers' photographs.

We may help Laura writing the rules and regulations posters.

They may place signs all around the congress premises.

NEGATIVE

She may not finish on time if she doesn't get help.

INTERROGATIVE

MAY is also used for POLITE REQUESTS in the interrogative.

May I take my cellphone to the conference?

May I close the window? It's cold in here.

May I take a selfie with you?

REQUESTS in the interrogative.

MAY is also used for POLITE