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