13 types فِعْل defective فِعْل and فِعْل ناقص .
In the فِعْل the meaning is complete.
فِعْل ناقص is a defective.
When a اسم enters in the مبتدا خبر make its own.
example:
زَيْدٌ قاءِمٌ - zaid is standing
كَنَ زَيْدٌ قاءِمً - zaid was standing.
Tarkeeb.
note
ا٫و٫ي these letters make فِعْل into weak verb.
| دَعَا | يَدْعُو/ يَدْعُ |
Thanks to rafeek hazrat.
https://blogs.transparent.com/
more details.
https://blogs.transparent.com/arabic/weak-verbs-the-naaqis-defective-verb-%D8%A7%D9%84%D9%81%D8%B9%D9%84-%D8%A7%D9%84%D9%86%D8%A7%D9%82%D8%B5/