Written rules
Telll a written rule you find in the library.
Students must/ must not ....
wear / a / uniform / students / school / to / have / at
Students have to wear a uniform at school.
To get a driver's license, you __________ pass a written exam and a road test.
To get a driver's license, you have to pass a written exam and a road test. (Reporting a written rule)
Students must arrive at their classrooms before the bell rings.
True
We often use ________ for more personal opinions about what it is necessary to do.
Must
Tell a written rule in the classroom.
Students must/ must not...
finish / I / tonight / report / this / must / definitely
I must definitely finish this report tonight.
I __________ remember to call my sister this weekend; it's her birthday!
I must remember to call my sister this weekend; it's her birthday! Internal Obligation (Personal)
You must use your mobile phone to text friends during a test.
False
_________ is used more in formal writing, for example in written notices.
Must
A written rule you need to follow in a bank.
Customers must/ must not...
has / the / she / early / to / for / train / wake / up
She has to wake up early for the train.
She __________ work late tonight because her team has a big deadline tomorrow.
She has to work late tonight because her team has a big deadline tomorrow. (The deadline is an external circumstance).
Everyone must wear a lab coat and safety goggles during science experiments.
________ expresses prohibition - something that is not permitted, not allowed.
Must not
Two rules that Mexican citizens need to obey.
Mexican must/ must not...
must / stop / light / drivers / red / at / the
Drivers must stop at the red light.
In most libraries, you __________ talk loudly or take phone calls.
In most libraries, you must not talk loudly or take phone calls. Prohibition: Use mustn't when something is strictly forbidden.
Students must smoke weed and drink Vodka and four loko in the classrooms.
False
Something that is not necessary.
Doesn't have to/ don't have to
Two things you must do when you are 18 years old.
An 18-year-old citizen must/ must not...
we / buy / do / tickets / to / advance / in / have / ?
Do we have to buy tickets in advance?
We __________ buy more milk; there is none left in the fridge.
We must/ have to buy more milk; there is none left in the fridge. (Both work here! Use must if you are telling yourself to do it, or have to because the empty fridge is a fact that forces the action).
You must raise your hand if you want to ask the teacher a question.
True
It is used to what somebody in authority has said it is necessary to do.
Have to and has to