1. Examples with "Must" (Strong internal obligation or logical necessity):
      1. You must finish your project by tonight.
        (It’s essential, likely because the speaker thinks it is.)
      2. She must attend the meeting; it's very important.
      3. We must study harder if we want to pass the exam.
      4. He must be at home; his car is parked outside.
        (Logical deduction)
      5. You must wear a seatbelt when driving.
      6. They must leave early to catch the first train.
      7. She must apologize for her mistake.
      8. You must take care of yourself.
      9. We mustn’t be late for the concert.
        (Negative obligation—prohibition)
      10. He must come to the doctor; his health is at risk.

      Examples with "Have to" (External obligation):
      1. I have to wake up early tomorrow for a meeting.
        (External schedule)
      2. You have to wear a uniform at work.
      3. She has to take medicine three times a day.
        (Doctor’s prescription)
      4. We have to follow the company’s new guidelines.
      5. You have to submit your application by next Friday.
      6. They have to finish the construction work by the end of the month.
      7. I have to call my boss before the meeting.
      8. He has to attend the workshop as part of his training.
      9. We have to wear helmets when cycling.
      10. She has to pass this exam to graduate.

      Examples with "Don't have to" (Lack of obligation):
      1. You don't have to come to the meeting if you're busy.
      2. We don't have to submit the report until next week.
      3. She doesn't have to wear formal clothes at this event.
      4. They don't have to stay the whole night.
      5. You don’t have to help me if you don’t want to.
      6. He doesn’t have to apologize; it wasn’t his fault.
      7. I don’t have to work on weekends.
      8. You don’t have to pay for the drinks; they’re free.
      9. She doesn’t have to study every day, but she prefers to.
      10. We don’t have to leave yet; there’s still time.

      Examples with "Mustn’t" (Prohibition):
      1. You mustn’t park here; it’s restricted.
      2. We mustn’t talk during the exam.
      3. He mustn’t tell anyone about the secret.
      4. She mustn’t eat sweets because of her diet.
      5. You mustn’t be late for your flight.
      6. They mustn’t smoke inside the building.
      7. You mustn’t interrupt when someone else is speaking.
      8. We mustn’t forget to bring our passports.
      9. He mustn’t use his phone in class.
      10. You mustn’t open the door to strangers.
BrightPlastics - Past and Present Tenses Exercise

BrightPlastics - Past and Present Tenses Exercise

John ___(1)___ BrightPlastics in a small garage. At first, it ___(2)___ a tough job. He ___(3)___ long hours every day, making plastic items. He ___(4)___ a lot about plastics and their qualities.

John ___(5)___ reliable suppliers for the raw materials. As the business ___(6)___, he ___(7)___ to a larger building. He ___(8)___ skilled workers and ___(9)___ recycling programs.

BrightPlastics ___(10)___ known for its excellent quality. John ___(11)___ on making sure every product ___(12)___ perfect. He ___(13)___ to customer feedback.

Even though the company ___(14)___ some challenges, like machine breakdowns, John ___(15)___ them quickly. He ___(16)___ proud of his achievements. BrightPlastics ___(17)___ into a successful company.

John ___(18)___ to work hard and ___(19)___ to make even better products. His story ___(20)___ that hard work and determination ___(21)___ success.

Possible Answers:

  • 1. (started / starts / starting)
  • 2. (was / is / has been)
  • 3. (worked / works / has worked)
  • 4. (learned / learns / has learned)
  • 5. (found / finds / has found)
  • 6. (grew / grows / has grown)
  • 7. (moved / moves / has moved)
  • 8. (hired / hires / has hired)
  • 9. (introduced / introduces / has introduced)
  • 10. (became / becomes / has become)
  • 11. (focused / focuses / has focused)
  • 12. (was / is / has been)
  • 13. (listens / listened / has listened)
  • 14. (faced / faces / has faced)
  • 15. (solved / solves / has solved)
  • 16. (felt / feels / has felt)
  • 17. (has grown / grows / grew)
  • 18. (continues / continued / has continued)
  • 19. (aims / aimed / has aimed)
  • 20. (shows / showed / has shown)
  • 21. (can create / creates / created)