Kalmar "murya mai aiki" tana nufin nau'in tsarin jumla wanda jigon jumla yake aiwatar da aikin da fi'ili ya siffanta. A wasu kalmomi, a cikin jumlar murya mai aiki, batun yana yin wani abu. Alal misali, a cikin jumlar "Kwarjin ya kori linzamin kwamfuta," abin da ake magana (cakulan) yana yin aikin (biran linzamin kwamfuta) don haka jumlar tana cikin murya mai aiki.Kishiyar ma'anar. murya mai aiki ita ce muryar da ba ta dace ba, wanda jigon jumlar ke karɓar aikin da fi'ili ya siffanta. A cikin jumlar murya mara ƙarfi, ana aiwatar da batun. Misali, a cikin jumlar “Kwarji ta kori linzamin kwamfuta,” abin da ake magana (beran) yana karbar aikin (katsin yana korarsa) don haka jumlar tana cikin murya mara kyau.