Error Detection for SSC CPO | Rules & Practice

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Avoid common traps

See where students commonly lose marks so you can eliminate bad options earlier.

Solve faster in exam

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Summary Formula Tricks Mistakes Solved Example Practice FAQ

Error Detection revision for SSC CPO: identify the tested rule, check context, eliminate invalid choices and review errors.

Error Detection tests whether a sentence violates standard grammar or usage. Frequent SSC areas include subject-verb agreement, tense, articles, prepositions, pronouns, modifiers, comparison and parallel structure.

SSC CPO focus: Read the complete sentence or passage, identify the tested language rule, eliminate structurally invalid choices and then verify meaning in context.

Error Detection revision: rule → context → elimination → answer verification → error review.

Core rule
Context check
Common trap
Approved practice

Check in order: subject-verb agreement → tense → pronoun → article/determiner → preposition → modifier/comparison → parallelism.

Find the true subject before judging the verb. Words placed between the subject and verb often create the trap.

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Practice Questions Login for free progress tracking

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Read the complete sentence or passage before finalising an answer.
Use grammar and context together rather than relying only on what sounds familiar.
After elimination, verify that the chosen option preserves the intended meaning.

Choosing an option only because it sounds familiar.
Ignoring contextual meaning while applying a grammar rule.
Using an absolute rule where standard English has an exception or usage constraint.

Practice example: Choose the part containing the error: The extent of the damage / were assessed / by the survey team / yesterday.

Solution: The error is in 'were assessed'. It should be 'was assessed'.

Choose the part containing the error: The scenery of the valley / are breathtaking / during the monsoon / season.
Choose the part containing the error: The information supplied by the witness / were incomplete / and required verification / by the officer.
Choose the part containing the error: The number of applicants / have increased / significantly / this year.

Learn the shortcut first

Shortcut before you solve

Error spotting gets faster when you scan the sentence by grammar checkpoints instead of reading it casually.

Faster solving steps

Use this 4-step method before solving to keep your thinking fast and repeatable.

Step 1 Identify relation

Spot the pattern, relationship, or core idea first.

Step 2 Apply same pattern

Use the same rule instead of re-solving from scratch.

Step 3 Eliminate wrong options

Remove confusing choices before comparing the last few.

Step 4 Confirm final answer

Pick the option that matches the shortcut most cleanly.

Practice Questions

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Now apply the trick on real questions

Use the shortcut above before solving these questions

Check subject-verb agreement, tense, article, preposition, and pronoun in that order.

Tip: In many error-spotting questions, the first grammatical mismatch is the answer.

Step 1

Subject is He, so the helping verb should be does.

Step 2

The error is in 'do not'.

Rule

Match helping verbs with the subject before checking smaller grammar details.

3-second trick

Check the finite verb first in most short error-spotting questions.

Trap to avoid

Ignoring subject-verb agreement while focusing on less important words.

Correct answer

'do' should be 'does'

Thinking path

He is a singular subject.
Singular present simple takes does, not do.
So the error lies in the helping verb.

Final answer: 'do' should be 'does'

Why this is fast: Verb agreement often reveals the error before you inspect the full sentence.

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Q1 Hard

Identify the error: 'A number of applications / has been received / for the vacant posts / this week.'