Chapter 48 — Expressing Certainty and Possibility | Unnati Classes
Chapter 48

Expressing Certainty and Possibility

48.1 Introduction

In English, we often talk about things that are sure or not fully sure. This is called expressing certainty and possibility.

In this chapter, you will learn simple English sentences to show certainty and possibility clearly.

48.2 Tips for Certainty and Possibility

  • Use words like sure, definitely for certainty
  • Use words like may, might, possible for possibility
  • Speak politely and clearly
  • Context decides certainty or possibility

48.3 50 Common Sentences for Certainty & Possibility

  1. 1. I am sure about this.
    → It is definitely correct.
  2. 2. This will happen.
    → There is no doubt.
  3. 3. I am confident.
    → I know the result.
  4. 4. This is certain.
    → It will occur.
  5. 5. I am sure he will come.
    → He promised.
  6. 6. It is obvious.
    → Everyone can see it.
  7. 7. This is guaranteed.
    → No risk involved.
  8. 8. She will definitely win.
    → She is well prepared.
  9. 9. I know the answer.
    → I studied well.
  10. 10. There is no doubt.
    → This is true.
  11. 11. It may rain today.
    → The sky is cloudy.
  12. 12. He might be late.
    → Traffic is heavy.
  13. 13. This could work.
    → If we try.
  14. 14. She may join us.
    → She is free today.
  15. 15. It is possible.
    → With effort.
  16. 16. He might call later.
    → He is busy now.
  17. 17. We may succeed.
    → If we work hard.
  18. 18. The train could be late.
    → Weather is bad.
  19. 19. This might help.
    → Try once.
  20. 20. It may not work.
    → We need a backup.
  21. 21. I am completely sure.
    → No confusion.
  22. 22. This is 100% correct.
    → Verified already.
  23. 23. I strongly believe this.
    → Evidence supports it.
  24. 24. This will surely help.
    → Trust the process.
  25. 25. It is confirmed.
    → Announcement made.
  26. 26. There is a chance.
    → Not guaranteed.
  27. 27. It may change.
    → Plans are flexible.
  28. 28. He could agree.
    → If explained well.
  29. 29. This might be useful.
    → Depends on need.
  30. 30. It may improve.
    → With practice.
  31. 31. I am absolutely sure.
    → No doubt at all.
  32. 32. This will definitely work.
    → Tested before.
  33. 33. She is surely right.
    → She checked it.
  34. 34. This is true.
    → Proven already.
  35. 35. I am certain.
    → I know this well.
  36. 36. It may happen.
    → Time will tell.
  37. 37. He might try.
    → If encouraged.
  38. 38. This could fail.
    → Risk exists.
  39. 39. She may agree.
    → After discussion.
  40. 40. It might rain.
    → Clouds are dark.
  41. 41. I am fully confident.
    → Prepared well.
  42. 42. This is final.
    → No changes.
  43. 43. The answer is correct.
    → Checked twice.
  44. 44. This is fixed.
    → Decision made.
  45. 45. I am sure it will help.
    → It worked before.
  46. 46. There might be a delay.
    → Due to traffic.
  47. 47. This may be correct.
    → Needs checking.
  48. 48. He could be right.
    → Let’s verify.
  49. 49. It may take time.
    → Be patient.
  50. 50. I am sure about the result.
    → I prepared well.

48.4 Worksheet — Certainty & Possibility

Section 1 — Fill in the Blanks

  1. I am ______ this is correct.
  2. It may ______ today.
  3. This will ______ work.
  1. sure
  2. rain
  3. definitely

Section 2 — Choose the Correct Sentence

  1. (It will rain sure / It may rain)
  2. (I am sure this is right / I maybe sure)
  1. It may rain
  2. I am sure this is right

Section 3 — True or False

  1. “May” shows possibility. (True / False)
  2. “Definitely” shows certainty. (True / False)
  3. Certainty means doubt. (True / False)
  1. True
  2. True
  3. False
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