Determine person and number before analyzing weak-letter operations. These selected forms are from قَالَ يَقُولُ.
PersonActive perfectActive imperfect
3rd masc. sg.قَالَيَقُولُ
3rd masc. dualقَالَايَقُولَانِ
3rd masc. pluralقَالُوايَقُولُونَ
3rd fem. sg.قَالَتْتَقُولُ
2nd masc. sg.قُلْتَتَقُولُ
1st singularقُلْتُأَقُولُ
1st pluralقُلْنَانَقُولُ
The isolated تَقُولُ may be third-person feminine singular or second-person masculine singular; context disambiguates.