Verbs ending in -e simply add -d to form the past tense. This is the most straightforward regular rule.
Vaccinate is regular. It follows the -d Addition rule.
Use past time markers: "Yesterday, she vaccinated to the store."
No. Use "did not vaccinate" (not "did not vaccinated").
The verb vaccinate follows the standard English past tense conjugation rule. When forming the past tense, vaccinate becomes vaccinated. This follows the -d Addition pattern, which is one of the most common conjugation rules in English.
Understanding why vaccinate becomes vaccinated helps with spelling and pronunciation. Verbs ending in -e simply add -d to form the past tense. This is the most straightforward regular rule.
When using vaccinated 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 vaccinated to the store." The past tense form does not change based on the subject — I vaccinated, you vaccinated, he/she vaccinated, we vaccinated, they vaccinated.