ABSTRACT
The two verb classes also differ in the future tense. The future suffix of firstconjugation verbs begins with f, while the second-conjugation suffix begins with ó/eo.
Verbs of the first conjugation form the future tense by adding the suffix -faidh to an imperative stem form ending in a broad vowel, and -fidh to a stem ending in a slender vowel:
seas stand seasfaidh will stand glan clean glanfaidh will clean dún close dúnfaidh will close scríobh write scríobhfaidh will write lig let, allow ligfidh will allow rith run rithfidh will run feic see feicfidh will see
Vowel-final stems again drop final -igh when the tense suffix is added, and (pronounced) i becomes long. The vowel of the stem form determines whether the broad or slender version of the suffix is used:
brúigh press, push brúfaidh will push dóigh burn dófaidh will burn léigh read léifidh will read nigh wash nífidh will wash
If the imperative stem is two syllables, the last consonant becomes broad
4 5 6 7 8 9 1011 1 2 13 4111 5 6 7 8 9 2011 1 2 3 4 5 6 7 8 9 3011 1 2 3 4 5 6 7 8 9 4011 1 2
The second-conjugation future ends in -óidh. Final -igh is dropped before adding the ending. If the first syllable of the verb ends in a slender consonant, the ending is -eoidh. Note that length is not marked on o after e.
