LessonsComplete Imperfect Paradigm: Active, Passive, Affirmative and NegativeQuiz

Prefixing لَا to the affirmative imperfect produces the negative indicative imperfect used in this paradigm. Merely adding this negative particle does not change person, number, gender or voice.

Word / formMeaning / explanation
يَفْعَلُ → لَا يَفْعَلُhe does → he does not.
يُفْعَلُ → لَا يُفْعَلُit is done → it is not done.
تَفْعَلِينَ → لَا تَفْعَلِينَyou (f.s.) do → you do not.

Here لَا is ordinary negation, not a prohibitive command. Hence the model verbs retain their indicative endings: لَا يَفْعَلُ still ends in ḍammah.

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Negating the imperfect with lā

Complete Imperfect Paradigm: Active, Passive, Affirmative and Negative

Prefixing لَا to the affirmative imperfect produces the negative indicative imperfect used in this paradigm. Merely adding this negative particle does not change person, number, gender or voice.

Word / formMeaning / explanation
يَفْعَلُ → لَا يَفْعَلُhe does → he does not.
يُفْعَلُ → لَا يُفْعَلُit is done → it is not done.
تَفْعَلِينَ → لَا تَفْعَلِينَyou (f.s.) do → you do not.

Here لَا is ordinary negation, not a prohibitive command. Hence the model verbs retain their indicative endings: لَا يَفْعَلُ still ends in ḍammah.