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