Must or should exercises
Must - mustn't
Must + infinitive = it is necessary to do something. For past tenses use had to.
positive - must
negative - mustn't
Mustn't (must not) + infinitive = it is necessary not to do something.
The car is damaged. You must repair it.
You mustn't touch the oil painting.
Must I look for the children?
English Must or should exercises
Must or should with free online exercises, examples and sentences, questions and must or should negative sentences.
Online exercises English grammar and courses
Free tutorial `must or should. English must or should exercises. English grammar easy to learn.