MUST +/ ?
Alphabet
MUST + /-
MUST / CAN
100
Respect your parents

You must respect your parents.

100

Letter of the alphabet that is a drink.

T (tea)

100

Use your cellphone in the cinema.

You mustn't use your cellphone in the cinema.

100

..... I use my phone?

Can
200

He ... stay in bed because he is ill.

must

200

Letter of the alphabet that is a part of the body.

I (eye)

200

Make loud noises after midnight.

You mustn't make loud noises after midnight.

200

You...tell lies. 

mustn't

300

be nice to people.

You must be nice to people.

300

Letter of the alphabet that is a question.

Y (Why) 

300

Be careful when you cross the street.

You must be careful when you cross the street.

300

Sorry, I ..... go the party, my parents don't let me.

can't

400

You...use spoons forks and knives when you eat in a restaurant. 

You must use spoons, forks, and knives when you eat in a restaurant.


400

Letter of the alphabet that is surprised

O (ow!)

400

Students ________ do their homework  

Students must do their homework  

400

I .... arrive on time to class. 

must