Conditional Mood in Irish

Overview

The conditional mood expresses what would happen under certain circumstances — "I would go," "she would buy," "we would eat." In Irish, the conditional is formed with a combination of lenition on the initial consonant and specific suffixes, making it a blend of the past tense's initial mutations and the future tense's endings.

For first conjugation verbs, the conditional adds -fadh/-feadh to the root with lenition (and d' before vowels/f). For second conjugation verbs, the ending is -ódh/-eodh with the same initial changes. The conditional is used not only for hypothetical situations but also in polite requests and in the result clause of conditional sentences with dá (if — hypothetical).

The irregular verbs have their own conditional forms, which generally combine the future stem with conditional endings. Mastering the conditional opens up polite conversation, hypothetical reasoning, and reported speech.

How It Works

First Conjugation: lenition + -fadh/-feadh

Root	Conditional	English
bris	bhrisfadh sé	he would break
cuir	chuirfeadh sé	he would put
dún	dhúnfadh sé	he would close
ól	d'ólfadh sé	he would drink
fan	d'fhanfadh sé	he would wait

Second Conjugation: lenition + -ódh/-eodh

Root	Conditional	English
ceannaigh	cheannódh sé	he would buy
mínigh	mhíneodh sé	he would explain
imigh	d'imeodh sé	he would leave
bailigh	bhaileodh sé	he would collect

Irregular Conditional Forms

Verb	Conditional	English
bí	bheadh	would be
téigh	rachadh	would go
tar	thiocfadh	would come
faigh	gheobhadh	would get
déan	dhéanfadh	would do
abair	déarfadh	would say
feic	d'fheicfeadh	would see
tabhair	thabharfadh	would give

First Person Forms

Person	Example	English
mé	D'ólfainn	I would drink
tú	D'ólfá	you would drink
sé/sí	D'ólfadh sé/sí	he/she would drink
muid	D'ólfaimis	we would drink
sibh	D'ólfadh sibh	you (pl.) would drink
siad	D'ólfaidís	they would drink

Negative and Question Forms

Form	Particle	Example
Negative	ní + lenition	Ní dhéanfadh sé é.
Question	an + eclipsis	An ndéanfadh sé é?
Neg. question	nach + eclipsis	Nach ndéanfadh sé é?

Examples in Context

Irish	English	Note
D'ólfainn caife.	I would drink coffee.	1st person -inn ending
Cheannódh sí é.	She would buy it.	2nd conjugation
Dá mbeinn saibhir, thaistealóinn.	If I were rich, I would travel.	Conditional with "dá"
Ní dhéanfadh sé é sin.	He wouldn't do that.	Negative conditional
An rachadh tú ann?	Would you go there?	Question with irregular
Bheadh sé go deas.	It would be nice.	Irregular: bí → bheadh
D'fhanfainn leat.	I would wait for you.	Vowel: d' prefix
Thiocfadh liom cabhrú.	I could help.	"thiocfadh liom" = I could
Ní cheapfainn é sin.	I wouldn't think that.	Negative 1st person
Ar mhaith leat cupán tae?	Would you like a cup of tea?	Polite offer

Common Mistakes

Forgetting both lenition and the d' prefix

• Wrong: Ólfadh mé caife
• Right: D'ólfainn caife.
• Why: Verbs starting with a vowel or f need d' in the conditional, and first person uses -inn ending.

Confusing conditional and future forms

• Wrong: Cheannóidh sé é when meaning "would buy"
• Right: Cheannódh sé é.
• Why: The future uses -óidh while the conditional uses -ódh. The difference is subtle but important.

Using má instead of dá for hypothetical conditions

• Wrong: Má mbeinn saibhir, cheannóinn teach.
• Right: Dá mbeinn saibhir, cheannóinn teach.
• Why: Má is for real conditions. Dá (+ eclipsis/subjunctive) is for hypothetical conditions that pair with the conditional mood.

Usage Notes

The conditional is widely used for politeness in Irish. Ar mhaith leat...? (Would you like...?) and Ba mhaith liom... (I would like...) are among the most common phrases in everyday interaction. In formal or literary Irish, you may encounter synthetic conditional forms where the person is built into the verb ending: dhéanfainn (I would do) rather than dhéanfadh mé.

Practice Tips

1. Convert five future tense sentences to conditional: Ceannóidh mé é → Cheannóinn é (I will buy it → I would buy it).
2. Practice polite requests using the conditional: Ar mhaith leat...?, An bhféadfá...? (Could you...?), An mbeadh sé i gceist agat...? (Would you consider...?)

Related Concepts

• Past Tense — shares the initial lenition pattern with the conditional
• Basic Conditional Sentences — using the conditional in if-then sentences
• The Subjunctive Mood — related mood used in wishes and after "dá"