Error Detection

🟢 Lite — Quick Review (1h–1d)

Rapid summary for last-minute revision before your exam.

Error Detection in SSC CGL tests your understanding of English grammar through identifying incorrect or inappropriate word usage in a sentence. Each question has a sentence with four underlined parts (A, B, C, D). You must identify which part contains the grammatical error. These questions test knowledge of subject-verb agreement, tenses, prepositions, articles, word choice, and sentence structure.

Common Error Types:

1. Subject-Verb Agreement: The verb must agree with the subject in number and person
2. Tense Errors: Inconsistent or incorrect tense usage
3. Article Errors: Wrong or missing articles (a, an, the)
4. Preposition Errors: Wrong preposition with words/phrases
5. Word Choice Errors: Wrong word form (noun vs verb vs adjective)
6. Parallel Structure Errors: Unequal grammatical elements in lists
7. Pronoun Errors: Wrong pronoun case or reference
8. Degree Errors: Wrong comparison form

Quick Rules:

Error Type	Rule
Subject-verb	”Each of,” “Every one of” → singular verb
Collective noun	British: collective takes singular verb in formal usage
Either/or, Neither/nor	Verb agrees with noun nearest to it
None	Can be singular OR plural (ambiguous)
Preposition + noun	Some fixed phrases: “afraid OF,” “capable OF,” ” consist OF,” “independent OF”

⚡ Exam Tip: In error detection, often only ONE part has an error. If you see “Each of the students have” — “have” should be “has” (each takes singular). But if all four seem correct, the answer might be “No error.” Don’t introduce errors that aren’t there.

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🟡 Standard — Regular Study (2d–2mo)

For students who want genuine understanding and problem-solving practice.

Subject-Verb Agreement Rules:

1. Compound subjects with AND: Usually plural verb

   • “Tom and Jerry are playing.” ✓

2. Compound subjects with OR/NOR: Verb agrees with part nearest to verb

   • “Neither the teacher nor the students were present.” ✓
   • “Neither the students nor the teacher was present.” ✓

3. Singular subjects followed by phrases: Singular verb

   • “The captain along with his team was rewarded.” (not “were”)

4. Indefinite pronouns:

   • Always singular: anyone, everyone, someone, nobody, somebody, each, either, neither
   • Always plural: both, few, many, several
   • Can be either: all, any, more, most, none, some

5. Collective nouns:

   • American English: Collective takes plural in informal, singular in formal
   • British English: Collective often takes plural
   • “The team are putting on their uniforms.” (British) vs “The team is winning.” (American)

Tense Consistency:

1. Sequence of Tenses: Main clause and subordinate clause should be logically consistent

   • “If it rains tomorrow, I will stay home.” (present → future)
   • “If it rained yesterday, I would have stayed home.” (past → conditional perfect)

2. Present Perfect vs Simple Past:

   • Present perfect: “has been” (action started in past, continues to present)
   • Simple past: “was” (completed action in past)
   • “I have lived here for five years.” (still living) vs “I lived here for five years.” (past, no longer)

Article Usage:

Use	Article
General countable noun	A/AN
Specific countable noun	THE
Uncountable nouns (abstract)	No article
Proper nouns (except the + plural or special names)	No article
superlatives	THE (the best, the tallest)

Preposition Patterns:

Word	Correct Preposition
Accused	OF (accused of murder)
Guilty	OF (guilty of the crime)
Intent	ON (intent on succeeding)
Eager	FOR (eager for success)
Relevant	TO (relevant to the topic)
Popular	WITH (popular with students)
Afraid	OF (afraid of failure)
Capable	OF (capable of doing)
Composed	OF (composed of three parts)
Consistent	WITH (consistent with previous data)
Independent	OF
Dependent	ON/UPON
Expert	IN (expert in mathematics)

⚡ SSC CGL-Specific Tip: In error detection questions, the error is often in commonly confused words: affect/effect, than/then, their/there/they’re, your/you’re, its/it’s, lie/lay, sit/set, rise/raise. Learn these pairs and their exact usage.

Commonly Confused Words:

Word	Meaning	Example
Accept	Receive	”I accept your offer.”
Except	Exclude	”Everyone except me was there.”
Affect	Verb: influence	”The rain affects my mood.”
Effect	Noun: result / Verb: cause	”The effect was devastating.” / “The medicine effected a cure.”
Complement	Complete / thing that completes	”The wine complements the meal.”
Compliment	Praise	”She gave me a compliment.”
Principal	Main / head / money	”The principal amount is ₹10,000.”
Principle	Rule / belief	”I follow the principle of honesty.”

Parallel Structure:

Items in a list must be grammatically parallel:

• “She likes hiking, swimming, and to bike.” ✗
• “She likes hiking, swimming, and biking.” ✓

With correlatives (both…and, either…or, neither…nor, not only…but also):

• “He not only finished first but also won the prize.” ✓

Common Student Mistakes:

• Confusing prepositions (especially with nouns and adjectives they modify)
• Using “who” vs “whom” incorrectly
• Mixing up “than” (comparison) and “then” (time)
• Incorrect use of “fewer” (countable) vs “less” (uncountable)

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🔴 Extended — Deep Study (3mo+)

Comprehensive coverage for students on a longer study timeline.

Advanced Agreement Patterns:

1. “Number of” vs “A number of”:

   • “The number of students is increasing.” (singular — refers to “number”)
   • “A number of students are waiting.” (plural — “students” is the subject)

2. Words ending in -ics (always singular when referring to the field):

   • “Mathematics is my favourite subject.”
   • “The acoustics in this hall are poor.” (when referring to actual sounds)

3. Fractions and quantities:

   • “Two-thirds of the cake was eaten.” (singular — “cake” is singular)
   • “Two-thirds of the students were present.” (plural — “students” is plural)

Conditional Sentences:

Type	Structure	Use
Type 0	If + present simple, present simple	General truths
Type 1	If + present, will + verb	Real, likely future
Type 2	If + past, would + verb	Unreal, hypothetical present
Type 3	If + past perfect, would have + past participle	Unreal, hypothetical past

Examples:

• Type 0: “If you heat ice, it melts.”
• Type 1: “If it rains tomorrow, I will cancel the trip.”
• Type 2: “If I had more money, I would buy a car.” (but I don’t)
• Type 3: “If she had studied, she would have passed.” (but she didn’t)

Subjunctive Mood:

Used for unreal or desired conditions:

• “I wish I were taller.” (not “was”)
• “If I were you, I would accept.” (not “was”)
• “God bless you.” (not “blesses”)
• “God save the Queen.” (not “saves”)
• “It is essential that he be present.” (subjunctive “be” even though sounds wrong — may be tested)

Pronoun Case:

Situation	Correct Form
Subject	I, you, he, she, it, we, they
Object	me, you, him, her, it, us, them
After preposition	me, you, him, her, it, us, them
Than/as + subject (implied verb)	I (not me) — “She is taller than I [am]”

Active vs Passive Voice:

Tense	Active	Passive
Simple present	He plays	He is played (incorrect!) → It is played
Simple past	He played	It was played
Present perfect	He has played	It has been played
Past perfect	He had played	It had been played

Degrees of Comparison:

• Positive: “This is a good book.”
• Comparative: “This book is better than that one.”
• Superlative: “This is the best book I have ever read.”

Irregular comparatives:

• Good → Better → Best
• Bad → Worse → Worst
• Little → Less → Least
• Much/Many → More → Most
• Far → Farther/Further → Farthest/Furthest

Words That Don’t Take More/Most:

• Superior, inferior, senior, junior, anterior, posterior, major, minor, perfect, unique, infinite, absolute, excellent, favourite

SSC CGL Previous Patterns:

2023 Tier I: Common errors included subject-verb agreement with collective nouns, preposition usage with adjectives, and confused word pairs (affect/effect, complement/compliment).

2022 Tier I: Errors in “None” as singular or plural, conditional sentence structures, and article usage with uncountable nouns.

⚡ Advanced Tip: For “None” questions, grammatically both singular and plural are acceptable. But SSC CGL typically treats “none” as singular in formal contexts. However, if “none of” is followed by a plural noun, the plural form often sounds more natural. The safest approach: if the singular verb option is available and sounds right, choose it; but if a plural option also exists, go with whichever is more commonly accepted.

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