Verbs ending in a consonant followed by -y change the -y to -ied in the past tense form.
Complexify is regular. It follows the -ied Conversion rule.
Use past time markers: "Yesterday, she complexified to the store."
No. Use "did not complexify" (not "did not complexified").
The verb complexify follows the standard English past tense conjugation rule. When forming the past tense, complexify becomes complexified. This follows the -ied Conversion pattern, which is one of the most common conjugation rules in English.
Understanding why complexify becomes complexified helps with spelling and pronunciation. Verbs ending in a consonant followed by -y change the -y to -ied in the past tense form.
When using complexified in writing, remember that it functions as a past tense verb and typically appears with time markers like yesterday, last week, or ago. For example: "Yesterday, she complexified to the store." The past tense form does not change based on the subject — I complexified, you complexified, he/she complexified, we complexified, they complexified.