Tense is the reference of one period of time to another in sentence. The most often referred to tenses are past, present, and future. These tenses are marked by morphological changes and by auxiliaries. In Gaelic, Most verbs have only a past or future form. The verb bi also has a present tense form (Tha, A' bheil, Chan eil, Nach eil). The present tense in Gaelic for other verbs is formed using periphrastic constructions.
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- Crystal, David (1999) The Penguin Dictionary of Language. London: Penguin.
- Matthews, P. H. (1997) The Concise Oxford Dictionary of Linguistics. Oxford: Oxford University Press.