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