Paradigm — second-person masculine singular and second-person masculine dual

The Imperative: Active and Passive Paradigms and Formation Rules

second-person masculine singular
Ordinary active: اِفْعَلْ
Ordinary passive: لِتُفْعَلْ
Heavy active: اِفْعَلَنَّ
Heavy passive: لِتُفْعَلَنَّ
Light active: اِفْعَلَنْ
Light passive: لِتُفْعَلَنْ
second-person masculine dual
Ordinary active: اِفْعَلَا
Ordinary passive: لِتُفْعَلَا
Heavy active: اِفْعَلَانِّ
Heavy passive: لِتُفْعَلَانِّ
Light active: —
Light passive: —
The direct active has اِفْعَلْ, but the second-person passive has لِتُفْعَلْ: imperative lām plus the passive imperfect.