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