zhè / wèi / yǔ / yán / xué / jiā / zhèng / zài / yán / jiū / ā / zhī / tè / kè / yǔ / de / yǔ / fǎ / jié / gòu这位语言学家正在研究阿芝特克语的语法结构。The linguist is studying the grammatical structure of the Aztec language.