TOEIC Link Part 5 — affect vs effect: The Part-of-Speech Test That Ends the Guess

The new shift policy is expected to ____ productivity across all three plants. The options offer affect, effect, affection, and effective, and most learners stall here not because they misunderstand the sentence but because affect and effect sound almost identical and they choose by ear. The answer is affect, and reaching it reliably has nothing to do with meaning and everything to do with which slot in the sentence the blank occupies. This guide gives you the part-of-speech test that assigns the two words every time, plus the two reversal traps TOEIC uses to punish anyone who memorized "affect is the verb" without the exceptions.

The rule that actually works: verb slot vs noun slot

Ninety percent of Part 5 items with this pair resolve on one mechanical fact:

• affect is the verb — "to influence or have an impact on." The delay affected our schedule.
• effect is the noun — "a result or outcome." The delay had an effect on our schedule.

So the test is: find what the blank is grammatically doing. If a subject needs a main verb — something the subject does — the slot is verbal and you need affect. If the blank sits after an article (an, the), a possessive, or an adjective, it is a noun slot and you need effect. In the opening item, "the new shift policy is expected to ____" needs an action verb after to, so the slot is verbal: affect. You never weigh what "affect" and "effect" mean — you locate the slot and match the part of speech. This is the same "identify the grammatical function first" discipline that governs transitive versus intransitive verb selection with raise and rise, where the surface pair feels interchangeable but the grammar is pinned to a specific structural role.

Trap 1: effect is also a verb — "to bring about"

Here is the reversal TOEIC weaponizes first. Effect has a second, formal life as a verb meaning "to bring about" or "to cause to happen," almost always paired with an abstract object like change, a transition, or a resolution:

• The committee was formed to **effect** change in the hiring process. (= to bring change about)
• Management hopes to **effect** a smooth transition to the new system.

Notice the difference from affect: affect change would mean "influence change" (odd and usually wrong), while effect change means "make change happen." When the object is change, a transition, a reform, or a solution, and the sense is cause into existence, the verb is effect, not affect. TOEIC sets up a to ____ change blank precisely to catch people who learned the flat rule "verb = affect." Read the object: if it is an abstract thing being brought into being, choose effect.

Trap 2: affect is also a noun — but rarely the one you want

The second reversal is narrower but appears in higher-level items. Affect exists as a noun in psychology, meaning "an observable emotional state or demeanor" (the patient displayed a flat affect). It is stressed on the first syllable and is not a synonym for effect. TOEIC rarely makes this the answer, but it plants affect as a distractor in a noun slot to see whether you will grab it just because the slot is nominal. Unless the sentence is explicitly about someone's emotional expression, a noun slot wants effect, not affect. Treat noun-slot affect as a trap by default and only accept it when the context is emotional demeanor.

The business collocations that lock the choice

Part 5 pulls this pair from a stable set of business frames. Recognizing the frame settles the part of speech instantly:

• Noun (effect) — have an effect on, the effect of X on Y, take effect (a policy starting), side effects, in effect (currently active), to that effect.
• Verb (affect) — affect sales, adversely affect, directly affect, negatively affect, affect the outcome.
• Verb (effect) — effect change, effect a transition, effect a recovery.

Two of these deserve a flag. Take effect and in effect are fixed noun phrases — a new rule takes effect on Monday, a contract clause is in effect. Learners who default to "verb = affect" wreck both. Match the fixed phrase, not the rule. This same "the collocation overrides the flat rule" logic is what makes time-preposition selection with in, on, and at resolve on the frozen phrase rather than on first principles.

Worked examples

1. Rising fuel costs have begun to ____ the company's shipping margins. Options: effect / affect / effective / affection. After to, the slot needs an action verb, and "influence the margins" is the sense — so affect.

2. The board established a task force to ____ a lasting change in workplace culture. Options: affect / effect / affected / effects. The object is a lasting change and the sense is bring about — this is the verb-effect trap, so effect.

3. The revised safety guidelines will take ____ at the start of next quarter. Options: affect / effect / affecting / effected. Take ____ is the fixed noun phrase "take effect," so the slot is a noun: effect.

4. Weather delays are unlikely to have any lasting ____ on the delivery schedule. Options: affect / effect / affects / effecting. After any lasting (adjective) the slot is a noun, and "have an effect on" is the frame: effect.

The two-second procedure for exam day

1. Read the slot, not the meaning. After to with an action sense, or as a main verb — verbal slot, default affect. After an/the/an adjective/a possessive — noun slot, default effect.
2. Check the object for the effect-verb trap. If the object is change, a transition, a reform and the sense is bring about, the verb is effect.
3. Check for a fixed phrase. take effect, in effect, to that effect, side effect are frozen nouns — the flat rule does not touch them.

Run those three steps and the pair stops depending on how the words sound — it becomes a slot-and-collocation exercise you can do the same way every time. For the broader habit of resolving same-sounding choices by grammatical role rather than instinct, see how former and latter pin to reading-order position rather than meaning.