Ṣumtu dahran — unspecified time, accusative.
Sāfartu shahran — bounded time, accusative.
Katabtu d-darsa yawman — bounded time; darsa is a separate direct object.
Darastu n-naḥwa laylatan — bounded time.
The first two are the book’s examples; the last two are teaching additions.
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Al-Mafʿūl Fīhi: Adverbials of Time and Place
Ṣumtu dahran — unspecified time, accusative.
Sāfartu shahran — bounded time, accusative.
Katabtu d-darsa yawman — bounded time; darsa is a separate direct object.
Darastu n-naḥwa laylatan — bounded time.
The first two are the book’s examples; the last two are teaching additions.