Home of English Grammar

Grammar Guide
  • Home
  • Exercises
  • Matches
  • Rules
  • Tools
    • Grammar Checker
    • Very Replacer
    • Word Counter
  • Top Social Media Posts
  • Various Posts
  • Vocabulary
  • Writing Guides
  • Contact

Needn’t vs. Mustn’t Exercise

September 17, 2024 - A1pdf

Fill in the blanks with needn’t or mustn’t.

Progress 0 of 12 answered
1You ............... violate the rules.
Wrong!
"Must not" is correct because violating the rules is prohibited.
2You ............... inform them; they already know.
Wrong!
"Needn't" is correct because informing them is not necessary.
3You ............... invite her; I don't want her to come.
Wrong!
"Must not" is correct because inviting her is not allowed.
4We have got plenty of time, so we ............... hurry.
Wrong!
"Needn't" is correct because hurrying is not necessary.
5They were safe, so I ............... have worried so much.
Wrong!
"Needn't" is correct because the worrying happened but was unnecessary.
6You ............... wake the baby up.
Wrong!
"Mustn't" is correct because waking the baby is prohibited.
7You ............... have woken me up so early; I don't have to go to work today.
Wrong!
"Needn't" is correct because waking me early happened but was unnecessary.
8We ............... have rushed; we could have taken our time.
Wrong!
"Needn't" is correct because rushing happened but was unnecessary.
9You ............... waste time on idle pursuits.
Wrong!
"Mustn't" is correct because wasting time is being presented as something you should not do.
10I know everything, so you ............... explain.
Wrong!
"Needn't" is correct because explaining is not necessary.
11You ............... say such nasty things.
Wrong!
"Must not" is correct because saying such nasty things is not acceptable.
12The meeting was delayed, so we ............... have started so early.
Wrong!
"Needn't" is correct because starting early happened but was unnecessary.
Done.
Score: 0/12
Share your score!

Answers

  1. You must not violate the rules.
  2. You needn’t inform them; they already know.
  3. You must not invite her; I don’t want her to come.
  4. We have got plenty of time, so we needn’t hurry.
  5. They were safe, so I needn’t have worried so much.
  6. You mustn’t wake the baby up.
  7. You needn’t have woken me up so early; I don’t have to go to work today.
  8. We needn’t have rushed; we could have taken our time.
  9. You mustn’t waste time on idle pursuits.
  10. I know everything, so you needn’t explain.
  11. You must not say such nasty things.
  12. The meeting was delayed, so we needn’t have started so early.
  • Share
  • Post
  • Post
  • Reddit
  • Email
  • WhatsApp
NEW: Try Matches, our daily vocabulary challenge. Pick a topic and level and match words with definitions to boost your vocabulary.
2,485,429 
761,532 
Improve Your Grammar
  • Download 2026 Grammar Guide (PDF)
  • Free Weekly Exercises & Vocabulary
  • Join over 3 Million English Learners
We respect your privacy. Unsubscribe anytime.

Grammar Checker

GrammarCheck.net - Try online
Hint → Bookmark GrammarCheck for future use.

Latest Posts

  • 100 Best Synonyms for “Stylish” June 20, 2026
  • 100 Best Synonyms for “Accomplished” June 20, 2026
  • 100 Best Synonyms for “Extreme” June 20, 2026
  • 100 Words to Describe Snow June 20, 2026
  • 100 English Phrases for Talking at a Garage Sale or Flea Market June 20, 2026
  • 100 Best Synonyms for “Communicatively” June 20, 2026
  • 100 Best Synonyms for “Ominous” June 20, 2026

Copyright © 2026 · EnglishGrammar.org
Disclaimer · Privacy Policy · Sitemap · Terms

Improve Your Grammar
  • Download 2026 Grammar Guide (PDF)
  • Free Weekly Exercises & Vocabulary
  • Join over 3 Million English Learners
We respect your privacy. Unsubscribe anytime.