EXAMPLES MODAL VERBS OF OBLIGATION

EXAMPLES MODAL VERBS OF OBLIGATION :
MUST, HAVE TO, SHOULD AND OUGHT TO

Examples:
a1) You must see a doctor at once !
a2)  I have to be at school tomorrow at 8 a.m. I have an exam !
a21) I've got to be at school tomorrow at .....
a3)  You mustn't touch that plate, it's too hot.
a4)  I had to see a doctor, because I felt very sick.
a5)  I had to break the window ! I lost my key !
a6)  The manager isn't here, he's had to go to Paris on urgent business.
a7)  Tomorrow the President will have to open Parliament.
a8)  She's having to move because she can't stand the noise.
a9)  I'm having to take out this detonator very slowly, to avoid an explosion.
a10)  Oh you're so kind!  You didn't have to do it as well as that !

b1)  He must be over eighty, he was born in 1930.
b2)  If my brother's not in London, he has to be in New York.
b3)  I've got all the right answers, I must be one of the winners !
b4)  If I remember correctly, it has to be here.
c1)  I can't find my laptop, I must have left it in the train.
c2)  If they're out, they mustn't have heard the news.