'must not'- ' don't have to'

 "Must not" and "don't have to" are both used to express negation or lack of obligation, but there are some differences in how they are used. "Must not" is used to indicate prohibition or something that is not allowed, while "don't have to" is used to indicate lack of obligation or something that is optional. Here is a chart to help explain the differences:

Modal Verb	Meaning	Example Sentence
Must not	Prohibition, not allowed	You must not smoke in this area.
Don't have	Lack of obligation, optional	You don't have to wear a tie to the party.
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Here are some exercises to practice using "must not" and "don't have to" correctly:

1. Choose the correct form of "must not" or "don't have to" to complete the sentences:

• You __________ park your car here. (must not/don't have to)
• We __________ wear formal attire for the event. (must not/don't have to)
• She __________ work late tonight, she finished her tasks early. (must not/don't have to)
• They __________ take the exam if they don't want to. (must not/don't have to)

2. Write sentences using "must not" and "don't have to" to express negation and lack of obligation:

• You __________ be late for the meeting. (must not/don't have to)
• He __________ wear a helmet while cycling. (must not/don't have to)
• They __________ follow the dress code for the party. (must not/don't have to)

Answers:

1. must not, don't have to, don't have to, don't have to
2. must not, don't have to, don't have to

I hope these exercises help you practice using "must not" and "don't have to" correctly!