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