Noun
a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect)
Source: WordNetAll other verbs use the perfect tense (hê + past participle) for the past. Source: Internet
The English example could of course be rephrased in the perfect tense as "The lawn has been mown.. Source: Internet
Then comes perfect tense -me- and an object marker -ki- agreeing with implicit kitabu 'book' (from Arabic kitab). Source: Internet