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