Avoid These Common Errors

Negating an Entire Class with لَا

Use an indefinite noun after لَا, remove tanwin from it, and keep it in the accusative form. If the predicate is one word, keep it nominative.

Incorrect
Correct
Reason

لَا رَجُلٌ قَائِمٌ
لَا رَجُلَ قَائِمٌ
اسمُ لَا is accusative without tanwin

لَا الرَّجُلَ قَائِمٌ
لَا رَجُلَ قَائِمٌ
the noun is indefinite in this pattern

لَا رَجُلَ قَائِمًا
لَا رَجُلَ قَائِمٌ
the single-word predicate is nominative