The general characteristics and specific language deficits of seven native speakers of
Persian who became aphasic (with three different etiologies) are discussed. Three major
linguistic deficits related to site and size of lesion and to individual differences emerge from
the data: breakdown of the verb, deletion of free grammatical morphemes, and substitution
of bound grammatical morphemes. Four types of language-specific agrammatic deficits are
described:(a) substitution of a filler verb/budan/'to be'as a default for all kinds of verbs …