TOEIC Link Part 5: lay versus lie

Lay and lie are the classic verb trap, and Part 5 loves them because the past tense of lie is spelled exactly like the present tense of lay. Lay is transitive — it always takes a direct object, so you lay something down. Lie is intransitive — it never takes an object, so a person or thing simply lies down on its own. Keep the object test in front of every blank and the pair stops being confusing. For another pair where the grammar of the slot decides the answer, see affect versus effect, and for a single-vowel twin that trips test-takers, see defer versus differ.

The core rule: object versus no object

• lay (verb, transitive) = to put or place something down; it needs a direct object: Please lay the documents on the table. / The crew laid the cable yesterday.
• lie (verb, intransitive) = to be or recline in a flat position; no object follows: The reports lie on the desk. / He lies down when he has a headache.

A memory hook: lay needs a place-the-object, so it always has a thing after it. lie stands alone — there is nothing between lie and the place it rests.

How to read the slot

Look at what comes right after the blank.

• If a noun (a direct object) follows, the slot wants lay: lay the foundation, lay the groundwork, lay the carpet.
• If a preposition or adverb follows with no object — on, down, in, beside — the slot wants lie: lie on the shelf, lie down, the goods lie in the warehouse.

So the fastest test: is there a thing being placed right after the blank (lay), or does the subject simply rest somewhere (lie)?

The past-tense trap

This is where Part 5 sets the real trap, because the forms overlap:

• lay → past laid, past participle laid: They laid the pipeline last month. / The plans were laid out clearly.
• lie → past lay, past participle lain: The boxes lay in storage all winter. / The contract has lain unsigned for weeks.

Notice that lay is both the present tense of lay and the past tense of lie. So The boxes lay in storage is correct — that is past-tense lie, not present-tense lay, because there is no object.

Common Part 5 traps

• "(blank) the groundwork / the foundation / the cable" is lay (or laid). A direct object signals the transitive verb: the firm laid the groundwork for expansion.
• "the documents (blank) on the desk" is lie (or lay in the past). No object after the verb means lie: the files lie untouched.
• "has (blank) idle for months" wants lain, not laid. The intransitive participle is lain: the equipment has lain idle.
• Watch passive voice. Only transitive verbs go passive, so the bricks were laid is correct, but the patient was lain down is wrong — lie has no passive.

Quick check

Decide whether the slot has a direct object (lay / laid) or none (lie / lay / lain), then choose.

1. The technicians (blank) the new flooring before the office reopened.
2. Several invoices (blank) on the manager's desk all week, unprocessed.
3. Please (blank) the samples carefully in the display case.
4. The merger plans had (blank) dormant until the new CEO arrived.

Answers: 1. laid — past of transitive lay, object flooring. 2. lay — past of intransitive lie, no object. 3. lay — transitive, object samples. 4. lain — past participle of lie, no object.

Why this pair matters on TOEIC

Business passages constantly lay groundwork, lay out plans, and lay cable, while reports, goods, and proposals lie on desks or lie idle in storage. Because the past tense of lie is the word lay, the test can show you a perfectly correct The crates lay in the dock and tempt you to "correct" it to laid. Anchor on the object test every time: a thing right after the verb means lay; no object means lie. For a related case where word form rather than meaning decides the slot, compare advice versus advise.