Indigenous Aryans were inter-related, and the notion of biological race came to the forefront The "Aryan race," the presumed identity of Indo-European language speakers was prominent among such races, which was seen to be further subdivided into "European Aryans" and "Asian Aryans," each with their own homelands. Max Mueller, who translated the Rigveda during 1849–1874, postulated an original homeland for all Aryans in central Asia, from where a northern branch was believed to have migrated to Europe and a southern branch came to India and Iran. The Aryans were fair-complexioned Indo-European speakers who conquered the dark-skinned "dasas" of India. The upper castes,
Simple past progressive. Regular verbs form the simple past end"-ed"; however there are a few hundred irregular verbs with different forms. For details see . Most verbs have a single form of the simple past, independent of the person or number of the subject (there is no addition of "-s" for the third person singular as in the simple present). However, the copula verb "be" has two past tense forms: "was" for the first and third persons singular, and "were" in other instances. The form "were" can also be used in place of "was" in conditional clauses and the like; for information