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