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