must vs have to

You ...... stop at a red traffic light

• mustn't

• must

• have to

• has to

Mustafa ....... walk the dog, his mum asked him

• have to

• must

• don't have to

• has to

you ...... to pay for it, it's free

• have to

• must

• don't have to

• mustn't

I ..... study a lot yesterday for my exam

• musted

• did have to

• had to

• did must

Ali ...... go to school on Saturdays, it's obligatory in his school

• must

• mustn't

• has to

• have to

........he ...... to prepare lunch?

• does he have

• do he have

• does he has

• do he has

the negative form of:

I had to call my mum

• I hadn't to call my mum

• I didn't had to call my mum

• I didn't have to call my mum

• I didn't hadn't to call my mum

to express an obligation, you use

• must

• have to

to express a prohibition, you use

• mustn't

• don't have to

the interrogative form of must is

• do you must?

• do you have to?