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