This verb follows the standard English past tense rule: simply add -ed to the base form.
Subtend is regular. It follows the Standard -ed rule.
Use past time markers: "Yesterday, she subtended to the store."
No. Use "did not subtend" (not "did not subtended").
The verb subtend follows the standard English past tense conjugation rule. When forming the past tense, subtend becomes subtended. This follows the Standard -ed pattern, which is one of the most common conjugation rules in English.
Understanding why subtend becomes subtended helps with spelling and pronunciation. This verb follows the standard English past tense rule: simply add -ed to the base form.
When using subtended 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 subtended to the store." The past tense form does not change based on the subject — I subtended, you subtended, he/she subtended, we subtended, they subtended.