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