Error Detection is an important topic in English grammar. It tests a student's ability to identify and correct grammatical mistakes in sentences.
For Class 9 and Class 10 students, error detection questions are useful for school examinations, grammar practice, vocabulary development, and competitive examinations.
This article contains 100 Error Detection Questions with Answers, covering subject-verb agreement, tenses, articles, prepositions, pronouns, adjectives, adverbs, conjunctions, modals, and sentence structure.
How to Solve Error Detection Questions
While solving an error detection question, check the sentence carefully for:
Subject-verb agreement
Tense
Articles
Prepositions
Pronouns
Adjectives and adverbs
Conjunctions
Modals
Singular and plural forms
Correct word usage
Part A: Subject-Verb Agreement
Questions 1–10
1. Identify the error:
He go to school every day.
A) He
B) go
C) school
D) every day
Answer: B) go
Correction: He goes to school every day.
2. Identify the error:
She play badminton every evening.
A) She
B) play
C) badminton
D) evening
Answer: B) play
Correction: She plays badminton every evening.
3. Identify the error:
The boys is playing football.
A) The
B) boys
C) is
D) playing
Answer: C) is
Correction: The boys are playing football.
4. Identify the error:
My brother and sister is at home.
A) My
B) brother
C) is
D) home
Answer: C) is
Correction: My brother and sister are at home.
5. Identify the error:
Each of the students have a notebook.
A) Each
B) students
C) have
D) notebook
Answer: C) have
Correction: Each of the students has a notebook.
6. Identify the error:
The news are very interesting.
A) The
B) news
C) are
D) interesting
Answer: C) are
Correction: The news is very interesting.
7. Identify the error:
Mathematics are my favourite subject.
A) Mathematics
B) are
C) favourite
D) subject
Answer: B) are
Correction: Mathematics is my favourite subject.
8. Identify the error:
Neither Ravi nor his friends was present.
A) Neither
B) friends
C) was
D) present
Answer: C) was
Correction: Neither Ravi nor his friends were present.
9. Identify the error:
There is many books on the table.
A) There
B) is
C) many books
D) table
Answer: B) is
Correction: There are many books on the table.
10. Identify the error:
One of my friends live in Delhi.
A) One
B) friends
C) live
D) Delhi
Answer: C) live
Correction: One of my friends lives in Delhi.
Part B: Tense Errors
Questions 11–20
11. I am knowing the answer.
A) I
B) am knowing
C) the
D) answer
Answer: B) am knowing
Correction: I know the answer.
12. She has went to the market.
A) She
B) has
C) went
D) market
Answer: C) went
Correction: She has gone to the market.
13. He did not went to school yesterday.
A) did
B) not
C) went
D) yesterday
Answer: C) went
Correction: He did not go to school yesterday.
14. They have completed the work yesterday.
A) They
B) have completed
C) work
D) yesterday
Answer: B) have completed
Correction: They completed the work yesterday.
15. I have been living here since five years.
A) have been
B) living
C) since
D) five years
Answer: C) since
Correction: I have been living here for five years.
16. She was went to the market.
A) She
B) was
C) went
D) market
Answer: B/C) was went
Correction: She went to the market.
17. When I reached the station, the train already left.
A) reached
B) station
C) already left
D) train
Answer: C) already left
Correction: When I reached the station, the train had already left.
18. He is working here since 2020.
A) is working
B) here
C) since
D) 2020
Answer: A) is working
Correction: He has been working here since 2020.
19. By next month, she will complete the course.
A) By
B) next month
C) will complete
D) course
Answer: C) will complete
Correction: By next month, she will have completed the course.
20. I am living in this city for ten years.
A) am living
B) this city
C) for
D) ten years
Answer: A) am living
Correction: I have been living in this city for ten years.
Part C: Articles
Questions 21–30
21. He is a honest man.
A) He
B) is
C) a
D) honest
Answer: C) a
Correction: He is an honest man.
22. She bought an new dress.
A) She
B) bought
C) an
D) new
Answer: C) an
Correction: She bought a new dress.
23. The Mount Everest is the highest peak in the world.
A) The
B) Mount Everest
C) highest
D) world
Answer: A) The
Correction: Mount Everest is the highest peak in the world.
24. I saw a elephant in the zoo.
A) I
B) saw
C) a
D) elephant
Answer: C) a
Correction: I saw an elephant in the zoo.
25. He wants to become an engineer.
A) He
B) wants
C) become
D) an engineer
Answer: No error
26. Sun rises in the east.
A) Sun
B) rises
C) east
D) No error
Answer: A) Sun
Correction: The Sun rises in the east.
27. She is the best student in class.
A) She
B) the best
C) student
D) class
Answer: D) class
Correction: She is the best student in the class.
28. My father is a doctor.
A) My
B) father
C) a doctor
D) No error
Answer: D) No error
29. He plays the cricket every Sunday.
A) He
B) plays
C) the cricket
D) Sunday
Answer: C) the cricket
Correction: He plays cricket every Sunday.
30. She gave me an useful book.
A) She
B) gave
C) an
D) useful
Answer: C) an
Correction: She gave me a useful book.
Part D: Prepositions
Questions 31–40
31. He is good in mathematics.
A) He
B) is
C) good in
D) mathematics
Answer: C) good in
Correction: He is good at mathematics.
32. She is interested on music.
A) She
B) interested
C) on
D) music
Answer: C) on
Correction: She is interested in music.
33. I have been waiting since two hours.
A) have been
B) waiting
C) since
D) two hours
Answer: C) since
Correction: I have been waiting for two hours.
34. He arrived to the station late.
A) He
B) arrived
C) to
D) late
Answer: C) to
Correction: He arrived at the station late.
35. She is afraid from dogs.
A) She
B) is
C) afraid from
D) dogs
Answer: C) afraid from
Correction: She is afraid of dogs.
36. The book is lying in the table.
A) book
B) lying
C) in
D) table
Answer: C) in
Correction: The book is lying on the table.
37. He depends of his parents.
A) He
B) depends
C) of
D) parents
Answer: C) of
Correction: He depends on his parents.
38. We discussed about the problem.
A) We
B) discussed
C) about
D) problem
Answer: C) about
Correction: We discussed the problem.
39. She is married with a doctor.
A) She
B) married
C) with
D) doctor
Answer: C) with
Correction: She is married to a doctor.
40. He entered into the room quietly.
A) He
B) entered
C) into
D) quietly
Answer: C) into
Correction: He entered the room quietly.
Part E: Pronoun Errors
Questions 41–50
41. Me and Rahul went to the market.
A) Me
B) Rahul
C) went
D) market
Answer: A) Me
Correction: Rahul and I went to the market.
42. Him and his brother are good friends.
A) Him
B) brother
C) are
D) friends
Answer: A) Him
Correction: He and his brother are good friends.
43. This book belongs to she.
A) This
B) belongs
C) to
D) she
Answer: D) she
Correction: This book belongs to her.
44. The teacher asked Rahul and I to stay back.
A) teacher
B) asked
C) Rahul and I
D) stay
Answer: C) Rahul and I
Correction: The teacher asked Rahul and me to stay back.
45. Everyone should do their work carefully.
A) Everyone
B) should
C) their
D) carefully
Answer: C) their
Correction: In traditional school grammar: Everyone should do his or her work carefully.
46. Neither of the boys brought their book.
A) Neither
B) boys
C) their
D) book
Answer: C) their
Correction: Neither of the boys brought his book.
47. This is the girl which won the prize.
A) This
B) girl
C) which
D) prize
Answer: C) which
Correction: This is the girl who won the prize.
48. The man whom came here is my uncle.
A) man
B) whom
C) came
D) uncle
Answer: B) whom
Correction: The man who came here is my uncle.
49. This is the boy who I met yesterday.
A) This
B) boy
C) who
D) yesterday
Answer: C) who
Correction: This is the boy whom I met yesterday.
50. Each student must bring their identity card.
A) Each
B) student
C) their
D) identity card
Answer: C) their
Correction: In traditional school grammar: Each student must bring his or her identity card.
Part F: Adjectives and Adverbs
Questions 51–60
51. He runs very fastly.
A) He
B) runs
C) very
D) fastly
Answer: D) fastly
Correction: He runs very fast.
52. She sings beautiful.
A) She
B) sings
C) beautiful
D) No error
Answer: C) beautiful
Correction: She sings beautifully.
53. He is a wisely man.
A) He
B) a
C) wisely
D) man
Answer: C) wisely
Correction: He is a wise man.
54. She speaks English fluent.
A) She
B) speaks
C) English
D) fluent
Answer: D) fluent
Correction: She speaks English fluently.
55. This is more better than that.
A) This
B) more better
C) than
D) that
Answer: B) more better
Correction: This is better than that.
56. He is senior than me.
A) He
B) senior
C) than
D) me
Answer: C) than
Correction: He is senior to me.
57. She is the most tallest girl in the class.
A) She
B) most tallest
C) girl
D) class
Answer: B) most tallest
Correction: She is the tallest girl in the class.
58. He worked hardly for the examination.
A) He
B) worked
C) hardly
D) examination
Answer: C) hardly
Correction: He worked hard for the examination.
59. The child behaved very badly.
A) The
B) child
C) behaved
D) very badly
Answer: D) No error
60. She is enough intelligent to solve the problem.
A) She
B) enough intelligent
C) solve
D) problem
Answer: B) enough intelligent
Correction: She is intelligent enough to solve the problem.
Part G: Modals and Auxiliary Verbs
Questions 61–70
61. You can to solve this problem.
A) You
B) can
C) to solve
D) problem
Answer: C) to solve
Correction: You can solve this problem.
62. He must to obey the rules.
A) He
B) must
C) to obey
D) rules
Answer: C) to obey
Correction: He must obey the rules.
63. She should studies regularly.
A) She
B) should
C) studies
D) regularly
Answer: C) studies
Correction: She should study regularly.
64. You ought obey your parents.
A) You
B) ought
C) obey
D) parents
Answer: C) obey
Correction: You ought to obey your parents.
65. May I to come in?
A) May
B) I
C) to come
D) in
Answer: C) to come
Correction: May I come in?
66. He does not knows the answer.
A) He
B) does
C) knows
D) answer
Answer: C) knows
Correction: He does not know the answer.
67. Did you went to school yesterday?
A) Did
B) you
C) went
D) yesterday
Answer: C) went
Correction: Did you go to school yesterday?
68. She did not understood the question.
A) She
B) did not
C) understood
D) question
Answer: C) understood
Correction: She did not understand the question.
69. He has to completed the work today.
A) He
B) has to
C) completed
D) today
Answer: C) completed
Correction: He has to complete the work today.
70. We should to respect our elders.
A) We
B) should
C) to respect
D) elders
Answer: C) to respect
Correction: We should respect our elders.
Part H: Conjunctions and Sentence Structure
Questions 71–80
71. Although he is poor but he is honest.
A) Although
B) poor
C) but
D) honest
Answer: C) but
Correction: Although he is poor, he is honest.
72. Because he was ill, therefore he could not attend school.
A) Because
B) ill
C) therefore
D) attend
Answer: C) therefore
Correction: Because he was ill, he could not attend school.
73. He is both intelligent as well as hardworking.
A) both
B) intelligent
C) as well as
D) hardworking
Answer: C) as well as
Correction: He is both intelligent and hardworking.
74. Unless you do not work hard, you will not succeed.
A) Unless
B) do not
C) work hard
D) succeed
Answer: B) do not
Correction: Unless you work hard, you will not succeed.
75. I will wait until you will return.
A) will wait
B) until
C) will return
D) No error
Answer: C) will return
Correction: I will wait until you return.
76. He is poor and he is honest.
A) He
B) poor
C) and
D) honest
Answer: D) No error
77. Neither he or his brother attended the meeting.
A) Neither
B) he
C) or
D) attended
Answer: C) or
Correction: Neither he nor his brother attended the meeting.
78. Either Ravi nor Mohan will come.
A) Either
B) Ravi
C) nor
D) come
Answer: C) nor
Correction: Either Ravi or Mohan will come.
79. He worked hard so that he could pass the examination.
A) He
B) worked
C) so that
D) No error
Answer: D) No error
80. I know the man who lives next door.
A) I
B) know
C) who
D) No error
Answer: D) No error
Part I: Common Word Usage Errors
Questions 81–90
81. He gave me an advice.
A) He
B) gave
C) an advice
D) me
Answer: C) an advice
Correction: He gave me some advice.
82. She made a mistake in the examination.
A) She
B) made
C) a mistake
D) examination
Answer: D) No error
83. I prefer tea than coffee.
A) I
B) prefer
C) than
D) coffee
Answer: C) than
Correction: I prefer tea to coffee.
84. He is suffering with fever.
A) He
B) suffering
C) with
D) fever
Answer: C) with
Correction: He is suffering from fever.
85. She returned back home yesterday.
A) She
B) returned back
C) home
D) yesterday
Answer: B) returned back
Correction: She returned home yesterday.
86. Please repeat it again.
A) Please
B) repeat
C) it again
D) No error
Answer: C) it again
Correction: Please repeat it.
87. He ordered for a cup of tea.
A) He
B) ordered for
C) cup
D) tea
Answer: B) ordered for
Correction: He ordered a cup of tea.
88. She is my cousin sister.
A) She
B) my
C) cousin sister
D) No error
Answer: C) cousin sister
Correction: She is my cousin.
89. I am having two brothers.
A) I
B) am having
C) two brothers
D) No error
Answer: B) am having
Correction: I have two brothers.
90. He discussed the matter with me.
A) He
B) discussed
C) the matter
D) No error
Answer: D) No error
Part J: Mixed Error Detection Questions
Questions 91–100
91. Every students must submit their assignment today.
A) Every
B) students
C) their
D) today
Answer: B) students
Correction: Every student must submit their assignment today.
92. She don't like spicy food.
A) She
B) don't
C) like
D) food
Answer: B) don't
Correction: She doesn't like spicy food.
93. The children enjoyed in the park.
A) The
B) children
C) enjoyed in
D) park
Answer: C) enjoyed in
Correction: The children enjoyed themselves in the park.
94. He has been studying since three hours.
A) has been
B) studying
C) since
D) three hours
Answer: C) since
Correction: He has been studying for three hours.
95. Neither of the answers are correct.
A) Neither
B) answers
C) are
D) correct
Answer: C) are
Correction: Neither of the answers is correct.
96. She is one of the best player in the team.
A) She
B) one of
C) best player
D) team
Answer: C) best player
Correction: She is one of the best players in the team.
97. He is accustomed to wake up early.
A) He
B) accustomed
C) to wake
D) early
Answer: C) to wake
Correction: He is accustomed to waking up early.
98. The teacher asked me where was I going.
A) teacher
B) asked
C) where was I going
D) No error
Answer: C) where was I going
Correction: The teacher asked me where I was going.
99. If I will get time, I will visit you.
A) If
B) will get
C) will visit
D) you
Answer: B) will get
Correction: If I get time, I will visit you.
100. He is working hard to achieve his goals.
A) He
B) is working
C) to achieve
D) No error
Answer: D) No error
Important Error Detection Rules for Class 9–10
1. Subject-Verb Agreement
A singular subject generally takes a singular verb.
Incorrect: She play tennis.
Correct: She plays tennis.
2. Use of Articles
Use a before a consonant sound and an before a vowel sound.
Incorrect: He is a honest man.
Correct: He is an honest man.
3. Since and For
Use since for a starting point of time and for for a period of time.
Since: since Monday, since 2020
For: for two hours, for five years
4. Modal Verbs
Modal verbs are followed by the base form of the verb.
Incorrect: He can to swim.
Correct: He can swim.
5. Comparative Forms
Avoid using two comparative forms together.
Incorrect: This is more better.
Correct: This is better.
6. Preposition Usage
Some words take specific prepositions.
interested in
good at
afraid of
depend on
suffer from
senior to
prefer to
7. Conditional Sentences
In a first conditional sentence, generally use the present simple after if.
Incorrect: If I will get time, I will come.
Correct: If I get time, I will come.
8. Question Structure
After question words in indirect questions, use statement word order.
Incorrect: He asked where was I going.
Correct: He asked where I was going.
Quick Revision Table
| Grammar Area | Common Error | Correct Form |
|---|---|---|
| Subject-Verb | He go | He goes |
| Tense | He did not went | He did not go |
| Article | a honest man | an honest man |
| Preposition | good in English | good at English |
| Pronoun | Me and Rahul | Rahul and I |
| Modal | can to go | can go |
| Comparison | more better | better |
| Conjunction | neither...or | neither...nor |
| Since/For | since two years | for two years |
| Conditional | If I will come | If I come |
How to Improve Error Detection Skills
Students can improve their error detection skills through regular grammar practice.
Revise basic grammar rules regularly.
Read every sentence carefully before choosing an answer.
Identify the subject and main verb first.
Check the tense of the sentence.
Pay attention to articles and prepositions.
Check singular and plural forms.
Practice common grammatical patterns.
Read English books, newspapers, and educational articles.
Maintain a notebook of common errors and corrections.
Take regular grammar quizzes to improve speed and accuracy.
Conclusion
Error Detection is an important English grammar topic for Class 9 and Class 10 students. It helps students identify common grammatical mistakes and understand the correct use of verbs, tenses, articles, prepositions, pronouns, conjunctions, adjectives, adverbs, and sentence structures.
Regular practice with 100 Error Detection Questions and Answers can help students strengthen their grammar and prepare effectively for school examinations, entrance tests, and competitive examinations.
