Form I defective/assimilated past tense, irregular
Form I hollow-defective irregular past tense
Form I hollow-defective yaa-yaa past tense
Form I hollow-defective yaa-yaa present tense
Form I hollow-defective present tense verbs
form I hamzated-defective past tense
form I hamzated verbs, past and present
Add more exceptions to form_I_defective_past hash