'by' + passive participle (be)

Many writers freeze at lines like "The book was laying on the table." Often it's wrong - but the rule becomes simple when you see it in context.

Here you'll find a short rule, a compact cheat sheet, memory tricks, plenty of realistic wrong/right pairs for work, school, and casual contexts, ready-to-use rewrite templates, and a quick 4-step checklist to fix sentences fast.

Short answer

Use a lie-form (lie / lay / lain / lying) when the subject is resting. Use a lay-form (lay / laid / laying) when someone places something or when the verb takes an object.

"The book was lying on the table." - correct for a resting book.
"She was laying the book on the table." - correct if she was placing it (transitive).
"The tiles were laid last year." - passive of lay (correct past participle).

Core explanation: lie vs. lay

Lie (intransitive) = recline or be located; no direct object. Lay (transitive) = put or place; needs a direct object. Confusion arises because the simple past of lie is lay, and the present of lay is also lay.

Lie family: lie - lay (past) - lain (past participle) - lying (present participle).
Lay family: lay - laid - laid - laying.
Quick test: can you answer "what?" after the verb? Yes → transitive (lay). No → intransitive (lie).

Quick grammar cheat sheet

Pick the verb family first (lie = resting, lay = placing). Then pick tense: progressive uses -ing; simple past is lay (intransitive) or laid (transitive); past participle is lain (intransitive) or laid (transitive).

Resting: lying (progressive), lay (simple past), lain (past participle).
Placing: laying (progressive), laid (simple past & past participle).
Passive uses the past participle: use "was laid" not "was laying" for passive meaning.

Memory tricks to pick the right verb

Two quick checks you can run while drafting an email.

Object check: ask "what?" after the verb. If you can name a direct object, use lay/laid/laying.
State vs. action: if the sentence describes a resting state, choose a lie-form; if it describes someone doing the placing, choose a lay-form.

Example: "She was laying on the couch." Ask "laying what?" - no object → "She was lying on the couch."
Example: "She was laying the book on the couch." Ask "laying what?" → "the book" → "laying" is correct.

Real usage and tone

"Laying" is correct when someone is actively placing something (progressive transitive). In speech many people say "I was laying on the couch" for "lying," but that informal use should be avoided in formal writing.

"She was laying tile all morning." - correct action.
"The pipes were laid last year." - correct passive form.
Informal: "I was laying on the couch." - common in speech; write "lying" in formal text.

Examples: common wrong/right pairs

Realistic sentences, wrong version first, then the correction. Use these as models.

Work:
Wrong: The report was laying on my desk when I arrived. -
Right: The report was lying on my desk when I arrived.
Work:
Wrong: The files were laying on the server with old names. -
Right: The files were lying on the server with old names.
Work:
Wrong: The team was laying the groundwork for the product launch. -
Right: The team was laying the groundwork for the product launch. (Here "laying" is
correct: they are placing groundwork.)
School:
Wrong: The textbook was laying open at chapter three. -
Right: The textbook was lying open at chapter three.
School:
Wrong: My essay was laying unfinished in my drafts. -
Right: My essay lay unfinished in my drafts.
School:
Wrong: He had laying the notes on the table before class. -
Right: He had laid the notes on the table before class.
Casual:
Wrong: I was laying on the grass watching clouds. -
Right: I was lying on the grass watching clouds.
Casual:
Wrong: The dog was laying in the sun. -
Right: The dog was lying in the sun.
Casual:
Wrong: They were laying under the stars when it began to rain. -
Right: They were lying under the stars when it began to rain.
Mixed: Wrong: The cake was laying on the counter - someone must have moved it. -
Right: The cake was lying on the counter - someone must have moved it.
Passive confusion: Wrong: The foundation was laying in 1999. -
Right: The foundation was laid in 1999. (Passive; "laid" is correct.)
Past participle: Wrong: The phone had laying there all day. -
Right: The phone had lain there all day.

Try your own sentence

Test the whole sentence in context rather than isolating the phrase. Context usually makes the correct verb form obvious.

Rewrite help: ready-to-use templates

Pick a template for work, school, or casual writing, plug in the subject, and send. If you mean placing, include an agent to make transitivity clear.

Work: Template: "The [document/item] was lying on the [place]." → "The report was lying on the conference table."
Work: Template for action: "The contractor was laying the new wiring."
School: Template: "The [book/text] was lying open at [chapter]." → "The textbook was lying open at chapter five."
School: Template for past action: "He had laid the notes on the table before class."
Casual: Template: "I was lying on [place] when..." → "I was lying on the balcony when the concert started."

Fix your own sentence: a 4-step checklist

Run these four quick checks in order to catch the usual mistakes.

Step 1 - Object check: Can you answer "what?" after the verb? Yes → transitive (lay). No → intransitive (lie).
Step 2 - Action vs state: Is someone actively placing something? Yes → lay-form. No → lie-form.
Step 3 - Tense: Progressive → -ing; simple past → lay (intransitive) or laid (transitive); past participle → lain (intransitive) or laid (transitive).
Step 4 - Substitute test: Swap in "placed" or "rested." If "placed" fits, use lay/laid/laying. If "rested" fits, use lie/lay/lain/lying.

Check: Sentence: "The book was laying in the corridor." 1) Object? No. 2) State → choose "lying." Final: "The book was lying in the corridor."

Similar mistakes to watch for

Training on lie/lay reduces errors with pairs like sit/set and confusion between passive and progressive forms.

Sit (intransitive): sit - sat - sat - sitting. Set (transitive): set - set - set - setting.
"Was laid" is passive: someone placed the object. Don't confuse it with "was lying" (resting).
Past participles: "lain" belongs to lie; "laid" belongs to lay.

Similar: Wrong: I set down because I was tired. -
Right: I sat down because I was tired.
Similar: Wrong: The wall was laying last year. -
Right: The wall was built last year. ("Laid" would apply only if people laid bricks.)

Hyphenation and spacing

Hyphens don't affect the lie/lay choice, but punctuation and spacing can hide the subject-verb link and cause errors. Keep verb phrases intact and avoid commas between subject and main verb.

Do not hyphenate verb phrases: use "lying down," not "lying-down."
Do not insert commas between subject and verb: "The book, was lying..." is wrong punctuation.
Avoid extra spaces before punctuation; they make scanning and automated checks less reliable.

Punct: Wrong: The book , was lying on the table. -
Right: The book was lying on the table.
Hyphen: Wrong: He was laying-down on the couch. -
Right: He was lying down on the couch.

FAQ

Is "The book was laying on the table" correct?

No - if the book was simply resting, write "The book was lying on the table." "Laying" implies placement or informal spoken use.

When do I use "was laid" instead of "was lying"?

Use "was laid" for passive meaning when someone placed the object: "The tiles were laid yesterday." Use "was lying" when the subject was resting.

Which is the past of "lie" - lay or laid?

The simple past of intransitive "lie" is "lay" (Yesterday the book lay on the table). "Laid" is the past of transitive "lay" (She laid the book down).

Is "I was laying on the couch" acceptable in speech?

Many native speakers say that informally. It's common in conversation but nonstandard in formal writing; use "I was lying on the couch" in written text.

Quick rule before sending an email?

Ask the object test: can you answer "what?" after the verb? If yes → lay/laid/laying. If no → lie/lay/lain/lying. If uncertain, substitute "placed" vs "rested."

Want a quick second opinion on one sentence?

Paste your sentence into a checker or compare it to the templates above. If still unsure, swap the verb for "placed" or "rested" - the correct form usually becomes obvious.

Keep the cheat sheet or a couple of model sentences handy when you write for work, school, or formal messages.