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