Error Detection in English Grammar: 60+ Rules with Examples for Beginners to Advanced Learners. Error detection tests your ability to spot and fix mistakes in sentences—key for exams like SSC, banking, or competitive tests.
This guide starts with simple rules (perfect for beginners), builds to tricky ones, and ends with exam traps. Each rule includes why it matters, beginner examples, advanced examples, and fixes.
Practice spotting errors daily!Quick Tips for Beginners: read sentences aloud—your ear catches awkward phrasing. Focus on one category at a time (e.g., articles first).Why? Exams repeat 80% of errors from these rules.
Pro tip: Underline subject, verb, and object to spot mismatches fast.
Error Detection in English Grammar | Articles & Determiners
(Basics for Beginners)Articles (a/an/the) signal nouns. Beginners trip on sounds; advanced learners watch exceptions.
A before consonant sound
Why? “A” for /j/ sound in “European.”
❌ An European country is beautiful.
✅ A European country is beautiful.
Advanced: A university (yoo- sound); an hour (ow sound).
An before vowel sound
Why? Smooth flow—vowel sounds: /a/, /e/, /i/, /o/, /u/.
❌ A apple a day keeps doctor away.
✅ An apple a day keeps the doctor away.
Advanced: An honest man (silent h); a one-way street.
The before unique things
Why? Specifies one-of-a-kind (sun, moon, earth).
❌ Moon shines brightly at night.
✅ The moon shines brightly at night.
Advanced: The Ganges (specific river); no “the” for lakes (Lake Titicaca).
No article before languages/names
Why? Proper nouns stand alone.
❌ The Hindi is spoken widely.
✅ Hindi is spoken widely.
Advanced: The English language (specific); English (general).
Much for uncountable; Many for countable
Why? Uncountable = mass (sugar); countable = items (chairs).
❌ Much chairs were broken.
✅ Many chairs were broken.
❌ Many sugar was wasted.
✅ Much sugar was wasted.
Advanced: Much/many with “too”: Too much noise; too many people.
Few/ little vs A few/A little
Why? “Few” implies not enough; “a few” means some.
❌ Few books is enough.
✅ A few books are enough.
Advanced: Little money (not enough); a little money (some).
2. Prepositions & Conjunctions
(Common Exam Favorites)Prepositions link words; conjunctions connect ideas. Beginners: Memorize pairs; advanced: Avoid overkill.
Good at (skill); In (place/field)
❌ He is good in painting.
✅ He is good at painting.
Advanced: Good in bed (idiom only!).
Interested in
❌ She is interested on history.
✅ She is interested in history.
Advanced: Interested to + V1 (BrE: I’m interested to know).
Depend on
❌ Success depends of luck.
✅ Success depends on luck.
Advanced: Depend upon (formal synonym).
Discuss (no “about”)
❌ We discussed about the exam.
✅ We discussed the exam.
Advanced: Talk about (allows “about”).
Married to
❌ She is married with a doctor.
✅ She is married to a doctor.
Advanced: Married with children (has kids).
Prefer … to
❌ I prefer books than movies.
✅ I prefer books to movies.
Advanced: Prefer V-ing: I prefer reading to watching.
Although/Though (no “but”)
❌ Although he tried but he failed.
✅ Although he tried, he failed.
Advanced: Though at end: It’s hard, though.
Because (no “so”)
❌ Because it rained so we stayed home.
✅ Because it rained, we stayed home.
Advanced: So because (informal: It rained, so because… no!).
Too … to
❌ He is too lazy so that he cannot succeed.
✅ He is too lazy to succeed.
Advanced: Too + adj + for + object: Too heavy for me.
In spite of/Despite (no “but”)
❌ Despite being sick but he worked.
✅ Despite being sick, he worked.
Advanced: Despite of (wrong—never use).
Error Detection in English Grammar | Subject–Verb Agreement
(Tricky for All Levels)Match subject (who/what) to verb. Beginners: Count subjects; advanced: Ignore phrases.
Each/Every → Singular
❌ Each student have a pen.
✅ Each student has a pen.
Neither/Either → Singular
❌ Either of the answers are correct.
✅ Either of the answers is correct.
Advanced: Both are (plural).
Either…or/Neither…nor → Nearest
❌ Either the teachers or principal are responsible.
✅ Either the teachers or the principal is responsible.
Along with/As well as → First subject
❌ Captain along with team are ready.
✅ The captain along with his team is ready.
One of + plural → Singular
❌ One of the girls were late.
✅ One of the girls was late.
Advanced: One of the girls who was late…
A number of → Plural; The number of → Singular
❌ A number of books is missing.
✅ A number of books are missing.
❌ The number of cars are increasing.
✅ The number of cars is increasing.
Indefinite pronouns → Singular
❌ Somebody know the answer.
✅ Somebody knows the answer.
Advanced:
None (singular/plural flexible).Pronoun agreement
❌ Every child must bring their notebook.
✅ Every child must bring his or her notebook.
Advanced: Their (modern singular they—exam-dependent).
Unreal condition → “were”
❌ If I was rich, I would travel.
✅ If I were rich, I would travel.
4. Tense & Verb Forms
(Build Confidence Step-by-Step)Tenses show time. Beginners: Match helpers; advanced: Sequence correctly.
Since (point) → Present Perfect
❌ I live here since 2020.
✅ I have lived here since 2020.For (period) → Present Perfect Continuous
❌ He is here for three months.
✅ He has been here for three months.
Did + V1
❌ She did not went shopping.
✅ She did not go shopping.
Has/Have + V3
❌ He has wrote a letter.
✅ He has written a letter.
Lay (put down):
Had + V3
❌ They had ate dinner.
✅ They had eaten dinner.
Will/Modal + V1
❌ She will sings; He should studies.
✅ She will sing; He should study.
Continuous → V+ing
❌ They are dance on stage.
✅ They are dancing on stage.
Do/Does + V1
❌ He does not likes cricket.
✅ He does not like cricket.
Exam Hack: 70% errors are in tenses/agreement.
No double tense
❌ He did not went.
✅ He did not go.
Advanced: Used to + V1 (habit).
5. Miscellaneous & Exam Traps
(Advanced Polish)Spot redundancies and idioms.
No double negatives
❌ I don’t have no money.
✅ I don’t have any money.
One of the + plural
❌ She is one of the best singer.
✅ She is one of the best singers.
Comparative (no “more” with -er)
❌ He is more faster than me.
✅ He is faster than I (formal: than I am).
Superlative with “the”
❌ She is smartest girl.
✅ She is the smartest girl.
Let + V1
❌ Let him to speak.
✅ Let him speak.
Suggest + V+ing
❌ He suggested to visit.
✅ He suggested visiting.
Advice (noun); Advise (verb)
❌ He gave an advise.
✅ He gave advice.
Advanced: Piece of advice.
Avoid repetition: Return/Repeat
❌ Return back; Repeat again.
✅ Return; Repeat.
Lie/Lay
❌ He is laying on the bed.
✅ He is lying on the bed.
Advanced:
Lay the book down.
Who/Whom
❌ Whom is calling?
✅ Who is calling? (subject).
Time yourself: Fix 10 sentences in 5 mins.
This version doubles the depth for beginners (simple whys/examples) while challenging advanced learners (nuances/exceptions), making it ideal for all levels. The flow builds skills progressively.
