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