Share Modals of obligation, prohibition and advice (present/past)
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What do we use to express obligation or necessity now and in the future? (3)
have to/must/need to
Which of them do we use to say that something happaned but it was not necessary...DIDN'T NEED TO or NEEDN'T HAVE+ V3..
needn't have+V3
Criticise a past action or say that it was a mistake we use...
should/shoudn't/have+V3 or ought to have+ V3
Which of them do we use to say there is no obligation or nessesity "MUSN'T, NEED TO, DON'T NEED TO, NEEDN'T TO, DON'T HAVE TO
don't have, don't need, needn't
To give advice or recommendations we use.... (3)
should/ought to/'d better
HAD BETTER or SHOULD = there is a problem or danger if you not follow the advice
had better
Is this sentence correct? "YOU'D BETTER TO STUDY FOR THIS TEST OR YOU'LL FAIL"
Incorrect "You'd better study..."
To express obligation or necessity in the past we use.... (2)
had to, needed to
Which of them do we use to say that something was not necessary and maybe it happened or mayby it didn't " DIDN'T HAVE TO, DIDN'T NEED TO or NEEDN'T HAVE+V3"
didn't have to, didn't need to
To say something is prohibited or not possible now or in the future we use.....
musn't, can't, be not allowed to
Is this sentence correct? "YOU NEEDN'T HAVE TO BUY ANY FOOD AFTER ALL, BECAUSE WE HAD PLENTY AT HOME"
Incorrect " ....NEEDN'T HAVE BOUGHT...."
Is this sentence correct? "I OUGHTN'T TO HAVE EATEN SO MUCH - I FEEL SICK.
Correct
