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    MODALS: CAN, MAY, MUST, HAVE TO

    CAN

    MUST

    1) Ability
    I can drive

    2) Possibility
    I can come

    1) Obligation
    I must do my homework.

    2) For an opinion that you think has a good possibility of being true.
    Look at his uniform. He must be a policeman.

    MAY

    HAVE TO

    1) Probability
    She may come tomorrow.

    2) In a very polite question
    May I open the window?

    1) In the affirmative: HAVE TO has a meaning similar to MUST.
    I have to go to the school.

    2) In the negative: HAVE TO has a different meaning: "you don't need to dot that"
    It's Sunday! I don't have to go to school.

     

     

    TEST : Fill in the gaps with CAN/CAN'T, MAY/MAY NOT, MUST/MUSTN'T, HAVE TO/DON'T HAVE TO

    JOHN: "_________ you come to the match this afternoon?"
    PETER: "I'm sorry. I _________ . I _________ wash my father's car."
    JOHN: "But it's raining! You _________ wash it!"
    PETER: "I know, but my parents say the rain _________ stop soon. And I _________ go out with you tonight because I _________ go to my grandmother's birthday party and I _________ come back late."

    ANSWERS

    JOHN: "CAN you come to the match this afternoon?"
    PETER: "I'm sorry. I can't . I MUST wash my father's car."
    JOHN: "But it's raining! You DON'T HAVE TO wash it!"
    PETER: "I know, but my parents say the rain MAY stop soon. And I CAN'T go out with you tonight because I MUST go to my grandmother's birthday party and I MAY come back late."