CREATE TABLE table_30039 ("Semitological abbreviation" TEXT, "Hebrew name" TEXT, "Arabic name" TEXT, "Morphological category" TEXT, "Hebrew Form" TEXT, "Arabic form" TEXT, "Approximate translation" TEXT)

How many Arabic forms are there for the 1st. plur. perfect category?
SELECT COUNT("Arabic form") FROM table_30039 WHERE "Morphological category" = '1st. plur. perfect'
SELECT COUNT("Arabic form") FROM "table_30039" WHERE "Morphological category" = '1st. plur. perfect'