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