TOEIC Link Part 5 Prepositions of Time and Place

Prepositions are the quiet point-losers of TOEIC Link Part 5. They look trivial — three letters, no inflection, easy to skim past — and that is exactly why they are tested so often. A single question can hinge on whether a meeting is "at" three o'clock, "on" Monday, or "in" March, and there is no grammar rule that rescues you if the collocation is not already automatic. The good news is that prepositions of time and place follow a tighter system than most learners realize, and the slice that TOEIC Link actually tests is small and learnable.

This guide breaks the system into two layers: the regular at/on/in pattern that covers the majority of items, and the fixed collocations that override the pattern. Then it shows how to tell, in the moment, whether a Part 5 preposition question is asking about meaning or about a memorized phrase — because the two need different strategies.

Why prepositions feel harder than they are

The trouble with prepositions is that they do not translate cleanly. Most languages map time and space onto a different set of words, so direct translation fails and learners fall back on guessing. Compounding this, prepositions carry almost no stress in speech, so they are easy to under-notice in listening and easy to misjudge in reading. The test exploits both facts: it offers three plausible prepositions and lets the candidate's uncertainty do the rest.

The fix is to stop treating prepositions as vocabulary and start treating them as a system. The at/on/in distinction for time, in particular, is rule-governed enough that you can answer most items by category rather than by feel. Knowing which question you are being asked is half the battle — the same diagnostic skill that separates a word-choice item from a word-form item, covered in word choice versus word form.

Prepositions of time: the at / on / in system

Time prepositions follow a scale from specific to broad.

at — precise points in time. "at 9 a.m.," "at noon," "at midnight," "at the start of the meeting." Also fixed: "at night," "at the moment," "at present."
on — days and dates. "on Monday," "on July 3," "on the weekend" (American usage; British "at the weekend"), "on the morning of the launch."
in — longer periods that contain you. "in March," "in 2026," "in the morning," "in the third quarter," "in the next two weeks."

The mental model is zoom level. at is a pinpoint, on is a single day, in is a span you sit inside. "The conference opens at 9 a.m. on Monday in March" climbs the scale in one sentence, and Part 5 frequently tests one rung of that ladder.

Watch the regular exceptions: "in the morning / afternoon / evening" but "at night." "on Monday morning" — when a day is attached, on wins over in. These small overrides are the most common trap, because they violate the clean rule the candidate just learned.

Duration and deadline prepositions

A second family handles spans and limits, and these are heavily tested in business contexts.

for — a length of time. "for three days," "for the duration of the project."
during — within a period. "during the meeting," "during the holidays."
within — before the end of a period. "within 30 days," "within the warranty period."
by — no later than a deadline. "Submit it by Friday."
until / till — up to a point in time. "The office is closed until Monday."
from … to / between … and — a span with two endpoints.

The most consequential pair is by versus until. "Finish it by Friday" means complete it before the deadline; "wait until Friday" means continue up to that point. The test sets these against each other constantly because they look interchangeable and are not. Both are also classic carriers of dates and deadlines, the same high-pressure territory as listening for numbers, dates, and times.

Prepositions of place: the at / on / in system

Place prepositions reuse the same three words on a spatial scale.

at — a specific point or address. "at the reception desk," "at 200 Main Street," "at the airport."
on — a surface or a line. "on the third floor," "on the table," "on the left," "on Main Street."
in — an enclosed space or area. "in the building," "in the conference room," "in Tokyo," "in the file."

Again, zoom level: at is a point, on is a surface, in is an enclosure. "Meet me at the office, on the fifth floor, in the east conference room" narrows from point to surface to enclosure. Directional prepositions — "to," "from," "into," "onto," "toward" — add movement and appear in items about deliveries, transfers, and travel.

Usage note: "in the office" versus "at the office" both occur but differ in nuance — "in" emphasizes being inside the space, "at" emphasizes presence at the location. Part 5 rarely splits this hair; when both seem possible, the surrounding collocation usually settles it.

Fixed collocations that override the system

Some prepositions are not chosen by logic — they are locked to a particular word and must be memorized. These are high-frequency on the test:

depend on, rely on, focus on, base on, comment on
interested in, involved in, increase in, expert in, succeed in
responsible for, apply for, account for, charge for, eligible for
comply with, deal with, familiar with, consistent with, cope with
refer to, respond to, contribute to, subject to, according to

When a Part 5 blank follows a verb or adjective like "depend," "responsible," or "comply," the question is not about meaning at all — it is testing whether you know the fixed partner. No zoom-level reasoning applies; either the collocation is automatic or it is not. Build these from real business documents, where they cluster densely — the language of meetings and scheduling is full of "depend on," "responsible for," and "comply with."

How to read a Part 5 preposition question in the moment

The decisive move is to identify the question type before you choose. Run three quick checks:

Is the blank a fixed partner? Look at the word before the blank. If it is a verb or adjective with a locked preposition (depend, responsible, comply, interested), retrieve the collocation — do not reason about meaning. If the partner is automatic, answer instantly.
Is the blank a time or place expression? Look at the word after the blank. A clock time → at; a day or date → on; a month, year, or long period → in. Apply the zoom-level rule.
Is it a deadline or duration? Check for "by/until," "for/during," "within." Match meaning: deadline (by), continuation (until), span (for/during), limit (within).

If none of the three fit, read the full sentence for meaning and pick the preposition that makes the relationship logical. But the majority of Part 5 preposition items are settled by checks 1 and 2 alone, in a few seconds, which is exactly why drilling the system pays off under time pressure.

Quick reference

Time: at = point, on = day/date, in = period. "At night" overrides; "on Monday morning" overrides.
Place: at = point, on = surface/line, in = enclosure.
Deadlines: by = no later than; until = up to; within = before the end.
Fixed partners (depend on, responsible for, comply with) are memory, not logic — look at the word before the blank.
Diagnose first. Decide whether the item tests a collocation, a time/place rule, or meaning before you choose.

Prepositions reward a small, disciplined investment more than almost any other Part 5 topic. Lock the at/on/in scale and the high-frequency fixed partners to reflex, learn to spot which of the three question types you are facing, and a category of items that used to feel like coin-flips becomes nearly automatic.