What is an ergative verb in English?

It is a verb that can be transitive or intransitive with the same kind of event, where the object of the transitive use becomes the subject of the intransitive use: Sioned opened the hatch, and The hatch opened. Open, break, close, change, start, and melt are typical members, and the intransitive sentence has no be and no by-phrase, so it is not a passive.

Is The door opened a passive?

No. The passive is The door was opened, with be and a past participle, and it still implies an agent. The door opened is the intransitive use of an ergative verb, told from the door's side, and you can add by Sioned to the passive but not to The door opened.

Which verbs are ergative?

A usable core: open, close, break, crack, snap, tear, change, start, stop, finish, melt, freeze, boil, burn, cook, increase, decrease, drop, rise, grow, ring, slam, swing. Heat melted the beeswax and The beeswax melted are the test. Write, eat, oil, and glaze fail that test and need a passive instead.

When should I use the intransitive form?

When the cause is obvious, unknown, or not the point, and you want the event as the topic: The hatch opened in the swell, The arcade closed at six, The beeswax melted in the pan. Use the transitive when the doer matters (Sioned opened the hatch), and a true passive when the verb is not ergative or when you want an agent in the grammar without putting it first.

Are ergative verbs the same as linking verbs?

No. A linking verb takes a complement (The hatch felt stiff; The hatch was open as a state), while an ergative verb keeps an action and swaps who the subject is (Sioned opened the hatch / The hatch opened). Open after be (The hatch was open) is a state, not the ergative event The hatch opened, and the two are neighbouring but different grammar.

English grammar · Advanced

Ergative Verbs: When the Object Becomes the Subject

Written by Eleanor Whitfield, Lead English Curriculum Editor · Reviewed September 2026

An ergative verb can be transitive or intransitive with the same meaning of the action, and the object of the transitive use becomes the subject of the intransitive use: Sioned opened the hatch; The hatch opened. Open, break, close, change, start, and melt are typical members. The intransitive sentence is not a passive. There is no be plus past participle, and there is no implied agent. The hatch opened says the event happened; The hatch was opened says someone opened it.

Sioned opened the hatch. The hatch opened.

the object of the first sentence is the subject of the second, with no passive form of be

What it is

Most English verbs keep a firm line between doer and receiver: Sioned scraped the hull, and the hull cannot scrape. A smaller set lets the receiver stand as the subject of the same verb, with no extra grammar: Sioned opened the hatch, and The hatch opened. Linguists call those verbs ergative (or, in some school grammars, ergative pairs or change-of-state verbs). The intransitive member is an event that can be described from the thing's point of view. It is not a short passive. The passive of open is was opened, and it still answers by whom, even when by whom is left out.

Sioned opened the hatch. (transitive: someone did it to the hatch) The hatch opened. (ergative intransitive: the event, no agent) The hatch was opened. (passive: an agent is implied even if unnamed)

How to spot it

Take a transitive sentence and try to promote the object to subject without adding be or a past participle. If The hatch opened, The beeswax melted, The kiln started, and The playlist changed are all grammatical and still describe the same kind of event, the verb is ergative. If The letter wrote or The rye baked itself in that frame sounds wrong, the verb is not.

Sioned opened the hatch. The hatch opened. (open as a typical ergative pair)
The freeze broke the mast. The mast broke. (break: thing as subject, no be)
Harun closed the arcade at six. The arcade closed at six. (close: agent optional)
Heat melted the beeswax. The beeswax melted. (melt: a change of state)

The intransitive form often sounds more natural when the cause is obvious, unknown, or not the point: The hatch opened in the swell. Naming Sioned would answer a different question.

Ergative Verbs Quick Reference

A core set of ergative verbs

Verb	Transitive (someone does it)	Intransitive (the thing as subject)
open / close	Sioned opened the hatch.	The hatch opened.
break / crack / snap / tear	The freeze broke the mast.	The mast broke.
change / vary	Nia changed the playlist.	The playlist changed.
start / stop / finish	They started the kiln at dawn.	The kiln started at dawn.
melt / freeze / boil / burn	Heat melted the beeswax.	The beeswax melted.
increase / decrease / drop / rise	The skipper increased the revs.	The revs increased.
cook / bake (some foods)	Harun boiled the kettle.	The kettle boiled.
ring / slam / swing (some doors, bells)	Iosif rang the vestry bell.	The vestry bell rang.

Common Ergative Verbs Examples in English

Ergative pairs grouped by the kind of event, so you can hear the object becoming the subject without a passive:

Opening, Closing, Starting, Stopping

Sioned opened the hatch. The hatch opened in the swell.: open: agent named, then dropped
Harun closed the arcade at six. The arcade closed at six.: close: same time phrase in both frames
They started the kiln at dawn. The kiln started at dawn.: start: process as event
Elowen stopped the mill race with a board. The mill race stopped.: stop: cause optional

Times and places sit happily on the intransitive side (at six, at dawn, in the swell) because the event, not the agent, is the topic.

Breaking, Melting, and Other Changes of State

The freeze broke the mast. The mast broke above the hounds.: break: the thing fails
Heat melted the beeswax. The beeswax melted in the pan.: melt: cause named, then dropped
The firing cracked the glaze. The glaze cracked along the rim.: crack: a visible change of state
March froze the mill race. The mill race froze overnight.: freeze: weather as cause, then the event

Change-of-state verbs are the heart of the class. The intransitive sentence reports what happened to the thing. It does not deny that something caused it; it simply does not say so.

Change, Growth, and Numbers

Nia changed the playlist. The playlist changed after midnight.: change: agent or event
The skipper increased the revs. The revs increased in the channel.: increase: numbers as subject
Warm March days dropped the mill pond. The mill pond dropped a foot.: drop: level as subject
They grew the business from a stall. The business grew from a stall.: grow: organisation as subject

With numbers, prices, levels, and organisations, the intransitive form is often the default, because nobody needs the agent: Interest rates rose. The playlist changed.

How Ergative Verbs Work

One verb, two frames. The intransitive frame is an event, not a hidden passive.

The Object of One Frame Is the Subject of the Other

In the transitive frame, someone or something causes the event: Sioned opened the hatch, Heat melted the beeswax. In the intransitive frame, the former object is the subject and the verb has no object: The hatch opened, The beeswax melted. The action is the same kind of event. What changes is whether the speaker names a cause.

Heat melted the beeswax. The beeswax melted.

beeswax is object, then subject, same verb melt

Cause + verb + thing, or thing + verb.

The Intransitive Frame Is Not a Passive

A passive is be plus a past participle, and it keeps an agent in the background: The hatch was opened (by Sioned). An ergative intransitive uses the plain verb and does not license a by-phrase: The hatch opened by Sioned is not English. Progressive and perfect forms stay active: The beeswax is melting, The mast has broken. If you can add by someone and the sentence still works, you have a passive, not an ergative.

The hatch opened. The hatch was opened by Sioned.

ergative event vs. true passive with by

No be, no by: not a passive.

Use the Intransitive When the Cause Is Not the Point

English prefers the thing as subject when the cause is obvious (the swell, the heat, the freeze), unknown, or simply not what the conversation is about. The hatch opened in the swell answers what happened. Sioned opened the hatch answers who did it. Both can be true of the same event. The choice is information structure, not truth.

The hatch opened in the swell.

the swell is a setting, not a by-agent

Thing as subject: the event is the topic.

Not Every Transitive Verb Is Ergative

Write, eat, build, scrape, oil, and glaze do not work this way: Sioned scraped the hull, but not The hull scraped in that meaning. Those verbs need a true passive if you want the thing as subject: The hull was scraped. A few verbs are only intransitive (arrive, sleep) and cannot take an object at all. Ergativity is a property of a list, not a rule you can apply to any verb.

Sioned scraped the hull. The hull was scraped. (not The hull scraped)

scrape is not ergative; the thing as subject needs a passive

If the thing cannot 'do' the verb, use a passive.

Common Mistakes with Ergative Verbs

Incorrect: The hatch opened by Sioned.

Correct: The hatch opened. / The hatch was opened by Sioned. / Sioned opened the hatch.

An ergative intransitive does not take a by-phrase. If you need to name the agent, use the transitive (Sioned opened the hatch) or a true passive (was opened by Sioned). Mixing the two frames is how the pattern breaks.

Incorrect: The letter wrote at dawn.

Correct: The letter was written at dawn. / Sioned wrote the letter at dawn.

Write is not ergative. The thing cannot stand as the subject of write without a passive. Open, break, and melt allow The hatch opened; write, eat, and oil do not.

Incorrect: The hatch was opened in the swell. (meant: it opened by itself)

Correct: The hatch opened in the swell.

The passive keeps an agent in the grammar and suggests that someone opened it. The ergative intransitive is the form that says the event happened, with the swell as a setting rather than as a by-agent.

Incorrect: Walking back from the quay, the hatch opened.

Correct: Walking back from the quay, Sioned saw the hatch open.

This is a dangling participle rather than an ergative error, but it is the mix C1 writers hit: the hatch cannot be the implied walker. The ergative sentence The hatch opened can stand on its own. It should not inherit a person-subject from a participle clause.

Verbs That Look Similar but Are Not Ergative

A few neighbouring patterns put a thing in subject position and still are not ergative pairs. They need a different analysis.

True transitives that need a passive

Write, eat, build, oil, glaze, scrape, and restore do not promote their object without be: The letter was written, not The letter wrote. If you want the thing as subject, use a passive. Trying the ergative frame produces a different meaning or an error.

Elowen glazed the tiles. The tiles were glazed. (not The tiles glazed, in this sense): glaze is not ergative here
Harun oiled the loom. The loom was oiled. (not The loom oiled): oil needs a passive for the thing as subject

Some food verbs go both ways in the kitchen (The kettle boiled, The porridge cooked) and still refuse others (The rye baked is possible; The rye ate is not).

Linking verbs are a different class

Be, seem, become, and feel take a complement, not an object: The hatch felt stiff. That is not an ergative pair of She felt the hatch. The two uses of feel are related in meaning and different in grammar. Ergative verbs keep the same action and swap who the subject is.

The hatch felt stiff in the swell.: linking feel + adjective, not ergative
Sioned felt the hatch. (a different feel: she touched it): transitive feel, not a pair with felt stiff

If the word after the verb is an adjective (stiff, open, shut as states), you may have a linking verb or a result adjective, not an ergative event. The hatch opened is an event. The hatch was open is a state.

Quick Check: Ergative Verbs

Rewrite so the thing is the subject, using an ergative intransitive where the verb allows it, or a passive where it does not.

1. Sioned opened the hatch. Thing as subject: The hatch ___.

Answer: opened

open is ergative: no be

2. Heat melted the beeswax. Thing as subject: The beeswax ___.

Answer: melted

melt is ergative

3. The freeze broke the mast. Thing as subject: The mast ___.

Answer: broke

break is ergative

4. Sioned wrote the letter at dawn. Thing as subject: The letter ___ at dawn.

Answer: was written

write is not ergative: use a passive

5. They started the kiln at dawn. Thing as subject: The kiln ___ at dawn.

Answer: started

start is ergative

Ergative Verbs FAQs

What is an ergative verb in English?: It is a verb that can be transitive or intransitive with the same kind of event, where the object of the transitive use becomes the subject of the intransitive use: Sioned opened the hatch, and The hatch opened. Open, break, close, change, start, and melt are typical members, and the intransitive sentence has no be and no by-phrase, so it is not a passive.
Is The door opened a passive?: No. The passive is The door was opened, with be and a past participle, and it still implies an agent. The door opened is the intransitive use of an ergative verb, told from the door's side, and you can add by Sioned to the passive but not to The door opened.
Which verbs are ergative?: A usable core: open, close, break, crack, snap, tear, change, start, stop, finish, melt, freeze, boil, burn, cook, increase, decrease, drop, rise, grow, ring, slam, swing. Heat melted the beeswax and The beeswax melted are the test. Write, eat, oil, and glaze fail that test and need a passive instead.
When should I use the intransitive form?: When the cause is obvious, unknown, or not the point, and you want the event as the topic: The hatch opened in the swell, The arcade closed at six, The beeswax melted in the pan. Use the transitive when the doer matters (Sioned opened the hatch), and a true passive when the verb is not ergative or when you want an agent in the grammar without putting it first.
Are ergative verbs the same as linking verbs?: No. A linking verb takes a complement (The hatch felt stiff; The hatch was open as a state), while an ergative verb keeps an action and swaps who the subject is (Sioned opened the hatch / The hatch opened). Open after be (The hatch was open) is a state, not the ergative event The hatch opened, and the two are neighbouring but different grammar.