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