Colegio San IgnacioConcepcinEntramos para aprender, salimos para servir

Use: We use Has/Have To to talk about responsibility and necessity. Examples: - I have to start my class at 8 oclock. - We have to study for a test. - She has to work on Saturdays.

Questions: Do you have to work hard?

- Does he have to work hard?

I We/You/TheyHave TOwork hard.He/She/ItHas

Form: Positive

Use: We use Not Have To to talk about something that is not necessary or not obligatory. .

Examples: - You dont have to wait for me. I can take a taxi. - We dont have to buy milk. Ive got some in the fridge - She doesnt have to drive. I can do it.

Form

I We/You/TheyDont Have TOwork hard.He/She/ItDoesnt Have

Question: - Should I see a doctor?- Do you think I should see a doctor?The forms of Should are the same for all persons:

Form: Positive and negative

I He/She/ItWe/You/TheyShoulddo more exercise tell liesShouldnt

Use: We use should to ask for and give advice To give opinions / suggestions / recommendations. Examples:

USEFUL EXPRESSIONS:

I think you should I dont think you should I think you shouldnt Why dont you What you should do is to. What should I do?

The forms of Must are the same for all persons:

Form: Positive

I He/She/ItWe/You/TheyMust

wear a seat belt when driving

Use: We use Must to express strong obligation To express strong advice Examples: Students must wear uniform at school (Obligation) You must see a doctor if youve got the Ebola virus. (Strong advice)

The forms of Mustnt are the same for all persons:

Form: Negative

I He/She/ItWe/You/TheyMustntsteal

Use: We use Mustnt to express prohibition Examples: We mustnt smoke in hospital.

Students mustnt cheat in tests

GO TO PAGE 135, AND DO EXCERCISE 3A (A B)

You dont have to / mustnt drink that water. Its not safe.

B. Smoking is prohibited here. You must not smoke here.

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