Solutions for: App 342 / Must and Must not (1)

Practise using "must" and "must not" in sentences!
Use "must" when you want to say that you or someone else needs to do something (or you get in trouble). For example: I must do my homework.

Use "must not/mustn't" when you or someone else needs to avoid doing something or are/is not allowed to do it. For example: You must not be late for class OR You must not smoke.
I ______ phone home when we arrive in London, so my parents won't worry.

Solution:
must
I ______ forget my sports gear for school today!

Solution:
must not
I ______ cross the road when the traffic light shows red.

Solution:
must not
I ______ feed my cats every night!

Solution:
must
I ______ take my keys today as nobody will be home when I return.

Solution:
must
I ______ forget to brush my teeth before going to bed.

Solution:
must not
Most children ______ wear school uniform in Great Britain.

Solution:
must
I ______ speak with a full mouth, my Dad says.

Solution:
mustn't
I ______ listen to my favourite music after school, because it relaxes me so much.

Solution:
must
Parents ______ look after their children well.

Solution:
must
We ______ use our phones in class.

Solution:
mustn't
I ______ practise my lines tonight so I know them for the show tomorrow!

Solution:
must
We ______ shout out in class but raise our hands instead.

Solution:
must not
I ______ eat all the bisquits but leave some for my brothers.

Solution:
must not