كَتَبْتَ — كَتَبْتُ — كَتَبْتِ
A different vowel on the subject tāʾ changes person or gender but not the stem’s building on sukūn.
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Person Changes, Building Stays
The Past Verb: Definition, Building, Conjugation and Parsing
كَتَبْتَ — كَتَبْتُ — كَتَبْتِ
A different vowel on the subject tāʾ changes person or gender but not the stem’s building on sukūn.