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In page Grammatical tense:

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Proto-Indo-European verbs had present, aorist and perfect forms – these can be considered as representing two tenses (present and past) with different aspects.[1]: 92  Most Indo-European languages have developed systems either with two morphological tenses (present or "non-past", and past) or with three (present, past and future).[citation needed] The tenses often form part of entangled tense–aspect–mood conjugation systems.[1]: 92  Additional tenses, tense–aspect combinations, etc., such as the future tense, can be provided by compound constructions using auxiliary verbs.[1]: 162