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