Verbs ending in a consonant followed by -y change the -y to -ied in the past tense form.
Regulatory is regular. It follows the -ied Conversion rule.
Use past time markers: "Yesterday, she regulatoried to the store."
No. Use "did not regulatory" (not "did not regulatoried").
The verb regulatory follows the standard English past tense conjugation rule. When forming the past tense, regulatory becomes regulatoried. This follows the -ied Conversion pattern, which is one of the most common conjugation rules in English.
Understanding why regulatory becomes regulatoried 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 regulatoried 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 regulatoried to the store." The past tense form does not change based on the subject — I regulatoried, you regulatoried, he/she regulatoried, we regulatoried, they regulatoried.