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