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