Error identification looks like it requires an ear for English. It does not. The rules tested are a short, finite list — subject and verb agreement, preposition pairs, comparison forms, parallelism, tense consistency — and each one has a mechanical test you can apply without any feeling for style.
That makes this the highest-return topic in the verbal section for a candidate whose English has gaps. A candidate with excellent intuitions and no rules will be beaten here by a candidate with ten rules and no intuitions, because the questions are built from the rules.
Do not read the sentence as a whole. Scan it in a fixed order, looking for one thing at a time.
Scanning in a fixed order matters because the eye is drawn to the longest or strangest phrase, which is usually not where the error is. The error is placed in one of the four zones above, and the words around it are there to distract you.
Subject and verb agreement. The verb agrees with the subject, not with the nearest noun. Phrases beginning with of are traps.
| Wrong | Right | Why |
|---|---|---|
| The list of items are long. | The list of items is long. | The subject is list, not items |
| Each of the students have a laptop. | Each of the students has a laptop. | Each is singular |
| One of my friend is here. | One of my friends is here. | One of takes a plural noun |
| Neither of them are ready. | Neither of them is ready. | Neither is singular |
Comparison forms. Do not double a comparison, and learn the pairs that take to rather than than.
| Wrong | Right |
|---|---|
| This is more better. | This is better. |
| He is senior than me. | He is senior to me. |
| She is junior than him. | She is junior to him. |
| It is superior than the other. | It is superior to the other. |
The words that take to are senior, junior, superior, inferior, prior, preferable and similar. Nearly every one of them appears in a past paper at some point.
Preposition pairs worth memorising.Discuss takes no preposition (not "discuss about"); explain takes to when the listener is named ("explain to me"); comprise takes no of; cope takes with, without up; married takes to; return takes no back. Preposition errors are among the easiest marks on the paper once you have the list.
Countable and uncountable. Fewer with countable things, less with quantities: fewer people, less water, fewer books, less traffic. Similarly many with countable nouns and much with uncountable ones.
Parallelism. Items joined by and or or must share a grammatical form. "She likes reading, writing, and to paint" breaks because two items are gerunds and one is an infinitive; it becomes "reading, writing and painting".
Tense with time words.Since and for divide cleanly: since needs a point in time (since Monday), for needs a duration (for three months). "He has gone yesterday" fails because a finished past time cannot take the present perfect: it becomes "He went yesterday".
Misplaced modifiers. A participial phrase at the start of a sentence attaches to the subject that follows. "Walking home, the rain soaked me" claims the rain was walking; it becomes "Walking home, I was soaked by the rain".
The committee, after reviewing all the documents submitted by the applicants, have decided to postpone the announcement.
The eye goes to the long phrase in the middle and suspects it. That phrase is grammatically fine. The error is in the zone the method checks first: subject and verb. Strip out the interrupting phrase and the sentence reads "The committee ... have decided", where the subject is singular. The correction is has decided.
Note both halves of the lesson. First, interrupting phrases are decoration — remove them and check agreement. Second, collective nouns such as committee, team, jury and government are treated as singular in formal written English, which is the register this test uses.
Find the error: The list of items are long.
Find the error: She is senior than her colleague in the department.
Find the error: She likes reading, writing, and to paint.
Without looking back: list four words that take to instead of than in comparisons, and give the rule for since versus for.
The answer is: senior, junior, superior and inferior; also prior, preferable and similar. Since takes a point in time, while for takes a duration.
Fill in the blanks from memory:
With countable nouns we use , and with uncountable nouns we use . The correct form is one of my . Before vowel sounds we use the article .
Find every error in this sentence and fix it: Each of the participants have been informed about the changes, and neither of the supervisors are available to discuss about the schedule.
There are three errors, and each one belongs to a different zone in the checklist.
Each of the participants have breaks subject and verb agreement: each is singular, so it becomes has. This is the first zone, and the plural noun immediately before the verb is the decoy.
Neither of the supervisors are is the same error again, and the test writers do repeat rules within one sentence: neither is singular, so neither ... is available. A candidate who catches the first one and stops has left a mark on the table.
Discuss about is a preposition pair: discuss takes no preposition, so it becomes discuss the schedule. This one is invisible to anyone reading for meaning, because the sentence's meaning was never in doubt — which is exactly why the preposition list has to be memorised rather than felt.
Error identification catches the rules one sentence at a time. The next lesson gathers the most frequently tested of those rules into a single place: subject-verb agreement, pronouns and modifiers, where a long interrupting phrase is the usual trap.