Optional omission: the verb could be spoken, but context permits leaving it unsaid.
Obligatory omission: a recognized construction requires the governing verb to remain unexpressed.
The text enumerates four positions for obligatory omission.
Opening interactive controls...
Optional vs Obligatory Ellipsis
Al-Mafʿūl Bih: Definition, Fronting and Omission
Optional omission: the verb could be spoken, but context permits leaving it unsaid.
Obligatory omission: a recognized construction requires the governing verb to remain unexpressed.
The text enumerates four positions for obligatory omission.