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