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