طَابَ زَيْدٌ عِلْمًا
Translation: Zayd is good in knowledge.
طَابَ: past verb.
زَيْدٌ: nominative subject.
عِلْمًا: accusative relational tamyīz clarifying that knowledge is the relevant aspect.
ʿIlman is not a direct object: ṭāba is not “to know”; the noun specifies the respect in which goodness applies.