You must do your homework maths teacher
-You mustn't watch tv so much grandmother
-You must clean your room mother
-You mustn't go to bed so late mother
-You must clean your teeth dentis
-You mustn't eat so many sweets dentis
-You must practise the piano music teacher
-You mustn'tn play so many computer games bossy sister
-You mustn't talk in the lesson head techer
-You mustn't chew gum when you talk head teacher
-You mustn't come home so late father
We have worked hard today.
Have we worked hard today?
Who have worked hard today?
How have we worked today? // When have we worked hard?
We have worked hard today, haven't we?
Have we worked hard today or for 2 hours?