CaseKey questionTypical expression
Nonmention, no ellipsisIs the action or agent's quality central?زَيْدٌ يُعْطِي
Indirect indicationIs generosity or another quality implied?يعطي in praise
Contextual ellipsisCan a specific object be recovered?قرأتُ after a question about a book
The first two can overlap: an agent's disposition may be indirectly conveyed without mentally restoring a particular object. In the third case the omitted object is part of the intended proposition.