Must: How and When to Use in English

Quick and simple lesson to help you understand grammar better.
Test your English and learn even more with Gymglish.

TEST YOUR ENGLISH Free trial and no commitment to buy
4,7 on App Store, Play Store and Trustpilot More than 8 million learners worldwide

Must

The auxiliary verb must can express:

• Obligation, duty, or need to do something:
I must attend this meeting. I have to, I need to attend this meeting.
He must pay his taxes before the end of the month. He is obliged to pay his taxes before the end of the month.
• certainty or a logical conclusion:
It's late, he must be at home now. It's late, so I imagine he is probably at home now.
The hardware works fine, it must be a software problem. The hardware is working perfectly, so I imagine it's probably a software problem.
In its negative form, mustn't always expresses prohibition:
You mustn't talk to strangers, kid. It's forbidden to talk to strangers, kid.

Still facing difficulties with 'Must'? Improve your English with Gymglish's English lessons - try our online English course for free now and receive a free level assessment!

What our users say:

Pleasure

         

I enjoy doing my online English lessons. Only ten minutes daily are enough...Thank you!

Innovative

         

I love your innovative method which allows me to learn a new language and have fun at the same time!

Unique

         

Your method is unique! Your courses have helped me to progress and gain confidence during my travels.

Progress

         

Gymglish has allowed me to improve my English. A daily routine I wouldn't miss for anything in the world!

More testimonials.

Find out about other grammar rules. Improve your English further and test Gymglish, online English lessons.

Tips for learning 'Must'? Share them with us!

TEST YOUR ENGLISH