Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: 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 )

### Question ###
How many Arabic forms are there for the 1st. plur. perfect category?

### Accurate SQL ###

SELECT COUNT("Arabic form") FROM table_30039 WHERE "Morphological category" = '1st. plur. perfect'