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