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