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