After twenty years in the field office, our regional director is used to ____ without reliable internet. The options offer work, worked, working, and works, and because used to also appears in sentences that demand a base verb, the choice feels like a coin flip. It is not. The answer is working, and the reason is mechanical: the phrase here is be used to — a form of be (is) sits in front of used to — and be used to always takes a gerund or noun, never a base verb. TOEIC blanks these three structures together precisely because they share the letters used to while obeying three different rules. This guide gives you the one structural test that separates them.
The rule: two questions decide everything
The three structures split on two mechanical questions you ask before you think about meaning:
- Is there a form of
beorgetdirectly in front ofused to?- No → it is
used to+ base verb, meaning a past habit or state that is no longer true:We used to hold the review in person. - Yes, a form of
be→ it isbe used to+ gerund/noun, meaning accustomed to (a current state):We are used to holding it remotely. - Yes, a form of
get→ it isget used to+ gerund/noun, meaning becoming accustomed to (a process/change):We are getting used to holding it remotely.
- No → it is
So the presence or absence of be/get decides the meaning, and the meaning decides what follows the blank. Read left of used to first, then read right of it. This "check the word class of what surrounds the blank" move is the same discipline that separates a time preposition from a time conjunction in since versus for: the surface words look identical, but the grammar tracks the structure around them.
The three meanings side by side
used to+ base verb → discontinued past:The company used to sponsor a summer retreat.(It no longer does.)be used to+ gerund/noun → established familiarity:The team is used to tight deadlines.(They are comfortable with them now.)get used to+ gerund/noun → ongoing adjustment:New hires get used to the ticketing system within a week.(They are in the process of adapting.)
The trap: base verb versus gerund
The single most common Part 5 distractor exploits the split between the base verb (after standalone used to) and the gerund (after be/get used to). The test writer places is, are, was, were, getting, or got somewhere in the sentence and then offers both the base verb and the -ing form in the answer choices:
The auditors are used to ____ (review / reviewing) documents under time pressure.→ reviewing, becauseare used to=be used to+ gerund.The auditors used to ____ (review / reviewing) documents in a shared room.→ review, because standaloneused to+ base verb.
The word to here is a preposition, not an infinitive marker — and prepositions take gerunds. That is why be used to working is correct and be used to work is wrong. If you can substitute a noun after the phrase and the sentence still makes sense (is used to the noise, is used to long hours), you are looking at the preposition to, and the verb form must be -ing. This is the same preposition-takes-a-gerund logic that governs look forward to hearing and object to signing.
The negative and question forms TOEIC reuses
The test recycles a small set of transformed structures. Memorize the shapes so a rearranged sentence does not disguise which structure you are in:
- Negative past habit —
did not use to(note:use, no-d, becausedidalready carries the past):The office did not use to require badge access.A frequent distractor offersdid not used to; the-dis wrong afterdid. - Question past habit —
Did the vendor use to offer on-site training?Againuse, notused. - Negative familiarity —
is not used to/are not used to:Remote staff are not used to commuting daily. - Not-yet-adjusted —
has not gotten used to/is still getting used to:She is still getting used to the new approval workflow.
The did not use to versus did not used to distinction is a favorite because it looks like a typo to learners who have only seen the affirmative used to. Flag any answer that pairs did/didn't with used — the auxiliary already marks tense, so the main form drops to use.
Why the distractors are tempting
The three structures overlap in learners' first languages, where a single expression often covers "former habit," "being accustomed," and "getting accustomed." TOEIC exploits that collapse. The defense is to stop translating and run the two-question test mechanically: (1) Is be or get present? (2) Given the answer to (1), does a base verb or a gerund follow? The meaning falls out of the structure, not the other way around — the same "let the grammar decide, not the gloss" approach that keeps count and noncount quantifiers straight in amount versus number.
Worked examples
1. Having relocated from a quiet branch, the analyst is gradually getting used to ____ in an open-plan office.
(A) work (B) worked (C) working (D) to work
→ (C) working. getting used to = get used to + gerund. The -ing form is required; the base verb (A) and infinitive (D) are traps built on misreading to as an infinitive marker.
2. Before the merger, the two divisions ____ report to separate vice presidents.
(A) are used to (B) used to (C) get used to (D) are getting used to
→ (B) used to. The base verb report follows, and the meaning is a discontinued past arrangement. Only standalone used to takes a base verb; every choice with be/get would demand reporting.
3. The procurement team did not ____ to negotiate multi-year contracts, but the new policy now requires it.
(A) used (B) use (C) using (D) be used
→ (B) use. After did not, the main form drops its -d: did not use to. Choice (A) did not used to is the classic trap.
The one-line decision rule
Look immediately left of used to. No be/get → base verb follows, meaning past habit. A form of be → gerund/noun follows, meaning accustomed. A form of get → gerund/noun follows, meaning becoming accustomed. And after any did/didn't, write use, not used. Run the structural check before you translate, and the coin flip becomes a rule.