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English Mentors Tips

Jen’s English Tip’s – Using “Must” in Sentences



Must expresses obligation and a strong necessity, it is followed by a verb without “to”.

Have to, is an equivalent of Must but not as strong.

Examples :

Muslims must pray (perform salah) five times a day.

Students have to do their homework.

Must not or Mustn’t (a contraction) expresses prohibition, something forbidden to do.

Examples :

You must not sit on grass.

You mustn’t smoke in a cinema.

Needn’t or don’t/doesn’t have to express the lack of necessity, something which is not necessary.

Examples :

You needn’t buy bread. We have plenty.

You don’t have to buy bread.

Must also expresses a logical conclusion.

Examples :

Rachel is absent from school today. She must be ill.

You must be kidding me.


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