Ag

Ag primarily denotes location (at, by), but also expresses possession, ongoing action, and agency.

Preposition Conjugated Dative

Overview

Ag takes the dative case.

It is perhaps the most versatile preposition in Irish, serving as the primary way to express “having” or “possession.”

Forms

PronounFormContrast FormTranslation
Iagamagamsaat me
Youagatagatsaat you
Heaigeaigeseanat him
Sheaiciaiciseat her
Weagainnagainneat us
You (pl)agaibhagaibhseat you
Theyacuacusanat them

Interrogatives

QuestionMeaningWhat happens next?Example
Cé + agBy whom?IndirectCé aige a bhfuil an leabhar?
Cad + agAt what?IndirectCad aige a bhfuil an deatach sin?
Cé + agWhich? Which of?DirectCé acu is fearr?

Mutations

Standard

Base ag + fuinneog
Mutated ag an bhfuinneoig

Rule Causes eclipsis with the article (except d/t).

Ulster/Connacht

Base ag + an + fear
Mutated ag an fhear

Rule Ulster prefers lenition after the article in almost all cases.

Munster

Base ag + an + doras
Mutated ag an ndoras

Rule Munster causes eclipsis even with d/t.


Core Functions

Spatial & Temporal (at, by, around)

Used for a fixed point in space or time.

  • Location: ag an bhfuinneoig — at/by the window.
  • Time: ag a trí a chlog — at 3 o’clock.
  • Events: ag an rince — at the dance.

Possession & Capacity (to have)

Irish has no verb “to have”. Instead, the construction bí + ag is used for a broad idea of “possession”.

  • Physical Objects: Tá teach aige — He has a house.
  • Languages: Tá Gaeilge agam — I speak (have) Irish.
  • Abilities: Tá snámh aige — He can swim (he has swimming).
  • Permission: Tá cead agat — You may (you have permission).
  • Obligation: Níl agat ach… — You just have to…

Derived Verbs

Some verbs exist in Irish as set constructions, instead of as a dedicated verb.

ConceptFormulaExampleTranslation
LoveGrá ag A ar BTá grá agam uirthi.I love her.
DesireDúil ag A i BTá dúil aige i bhfíon.He desires wine.
InterestSuim ag A i BAn bhfuil suim agat ann?Are you interested in it?
NeedGá ag A le BTá gá agam le hairgead.I need money.
HatredFuath ag A do BTá fuath agam don fhuacht.I hate the cold.

Continuous Aspect

When placed before a Verbal Noun, it creates the “ing” form in English.

  • Tá mé ag ithe — I am eating (lit. “I am at eating”).

Agency & Cause

Ag identifies the person responsible for a state or the cause of a feeling.

  • Physical Cause: Táim tinn ag an ngrian — I’m sick from the sun.
  • Result of Action: Táim bodhar agat — You have me deafened (by your noise).
  • Perfective Aspect: Tá an bord briste agam — I have broken the table — lit. The table is in a state of broken by me.
  • Opinion: Is beag agam é — I think little of it — lit. It is little “at me”.

The Partitive (Subset of a group)

Used to describe “some of” or “many of” a group, specifically with plural pronouns.

  • Group: go leor acu — many of them.
  • Selection: duine againn — one of us.
  • Comparison: Cé acu is fearr? — Which (of them) is better?

Adjectival Reference (For/By)

When following an adjective, ag defines the person for whom the quality applies.

  • Relative ease: éasca agam — easy for me.
  • Subjective weight: trom aici — heavy for her.
  • Character: deas agat — nice of you.

Dialectal Variations

The “Chuig” Replacement

In Connacht and Ulster dialects, ag often replaces the preposition chuig (towards/to) due to phonetic merging.

  • Ag an fhear — To the man.

Connacht Shortened Forms

In rapid speech, the “ag-” prefix is often dropped.

StandardShort FormEmphatic
agam’am’amsa
agat’ad’adsa
againn’ainn’ainne