TOEIC Link relative clauses — choosing who/which/that/whose, defining vs non-defining usage, relative adverbs where/when/why, and the 5 patterns that trip up fill-in-the-blank items

Core selection rules for relative pronouns

Relative pronouns are determined by two axes: (1) is the antecedent a person or a thing, and (2) what role does the relative pronoun play in the relative clause — subject, object, or possessive. Person + subject = who; person + object = whom (informal who is acceptable); person + possessive = whose. Thing + subject or object = which; thing + possessive = whose (yes, whose works for things) or of which. that works for both people and things, but only in defining (no-comma) clauses — never in non-defining (comma-set-off) clauses.

That last constraint — that cannot be used in non-defining clauses — is a recurring fill-in-the-blank trap. "My laptop, ___ I bought last year, has started slowing down" must be which, not that. The same sentence without the comma — "The laptop ___ I bought last year is slowing down" — accepts both that and which, with that being the more colloquial choice. When the answer choices include both that and which, scan for commas first and eliminate that on sight if any are present.

whose handles possession ("the company whose CEO resigned") and works for both people and things. A common miss: learners assume whose only applies to people. "The building whose roof was damaged" is fully correct English. The alternative "the building of which the roof was damaged" is grammatical but stilted. TOEIC Link periodically tests whose with thing-antecedents to catch this misconception.

Relative adverbs where / when / why introduce place, time, and reason clauses. The diagnostic: a relative adverb is followed by a complete sentence (subject + verb + object all present), while a relative pronoun (which / that / who) is followed by an incomplete sentence with a missing subject or object. "the office where she works" — works is intransitive and the clause is complete → relative adverb where. "the office which she opened" — opened needs an object and one is missing → relative pronoun which.

• Person + subject role: who
• Person + object role: whom (informal who)
• Thing + subject/object: which
• Possessive (person or thing): whose
• Defining clauses only: that
• After where/when/why: complete sentence

Five patterns that trip up fill-in-the-blank items

*Pattern 1: comma + that trap*. "The new policy, ___ was announced yesterday, requires all employees to..." — even if that appears in the answer choices, do not select it. Non-defining clauses require which. Many learners default to that because it feels safe, but the comma is the disqualifier — eliminate that the moment a comma is visible before the blank.

*Pattern 2: subject vs object misidentification*. "The candidate ___ we interviewed yesterday accepted the offer" — interviewed is missing its object, so the relative pronoun fills the object role. Person + object = whom (strict) or who (informal). TOEIC Link tends toward strict, so whom is the safer choice. Conversely, "The candidate ___ accepted the offer was qualified" — accepted is missing its subject, so this is who (subject). Train yourself to scan for the missing slot in the relative clause: missing subject → subject form, missing object → object form.

*Pattern 3: relative adverb vs relative pronoun confusion*. "The day ___ she arrived" — arrived is intransitive and the clause is complete → when. "The day ___ she remembers most" — remembers is missing its object → which / that. The same noun day takes different relatives depending on what follows. When you see a time- or place-noun antecedent and answer choices include both relative pronouns and relative adverbs, check the completeness of the post-blank clause first.

*Pattern 4: preposition + relative pronoun word order*. "The colleague ___ I work with is..." and "The colleague with whom I work is..." mean the same thing, but the latter only works with whom or which — never that. "The colleague with that I work" is ungrammatical. When a preposition immediately precedes the blank, that can be eliminated as a definite filter.

*Pattern 5: object-relative omission in fill-in-the-blank*. "The book that I bought yesterday" can be written as "The book I bought yesterday" — object-role relative pronouns are deletable in defining clauses. But fill-in-the-blank items present a blank that must be filled, so the omitted-form is not a valid answer choice. The correct answers are that or which (object form). Listening, by contrast, frequently uses the omitted form, so train your ear for "noun + (omitted relative) + subject + verb" structures separately from your fill-in-the-blank training.

Catching relative clauses when listening at native speed

In Listening Parts 3 and 4, relative clauses appear in nearly every passage, and the omitted-relative form ("the report I wrote yesterday was approved") is especially common. To process this at native speed, build a habit of immediately recognizing "noun + subject + verb" as a relative clause with the relative pronoun omitted, equivalent to "noun + that/which + subject + verb."

Non-defining (comma-marked) clauses are signaled by a brief pause in spoken English. "My manager — who joined last month — approved the budget" requires you to bracket the inserted clause and connect "My manager approved the budget" as the main thread, with "who joined last month" as supplemental information. Shadowing exercises that include the pauses train your brain to maintain this hierarchical parse in real time.

In Part 4 announcements and speeches, relative clauses are often where the question answer hides. "Our new product, which features advanced AI capabilities, will launch next month" — if the question is "What feature does the new product have?" the answer is inside the relative clause: "advanced AI capabilities." When listening, treat relative clauses as parenthetical and check whether the question keyword matches the main clause or the relative clause to locate the answer.

Pitch is another listening cue. Native speakers tend to render relative clauses at slightly lower pitch and faster pace than the main clause. Tuning to that pitch shift makes the hierarchical structure of the sentence audible. EnglishBlitz listening materials are intentionally weighted with relative-clause-rich passages to train this discrimination over a graded sequence.

Relative-pronoun selection matrix

* "Omitted" applies only in defining clauses with object or adverb role. Fill-in-the-blank items rarely accept omission unless zero is an explicit choice.

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