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