This verb follows the consonant-vowel-consonant (CVC) pattern. The final consonant is doubled before adding -ed to maintain the short vowel sound.
Useful is regular. It follows the Consonant Doubling rule.
Use past time markers: "Yesterday, she usefulled to the store."
No. Use "did not useful" (not "did not usefulled").
The verb useful follows the standard English past tense conjugation rule. When forming the past tense, useful becomes usefulled. This follows the Consonant Doubling pattern, which is one of the most common conjugation rules in English.
Understanding why useful becomes usefulled helps with spelling and pronunciation. This verb follows the consonant-vowel-consonant (CVC) pattern. The final consonant is doubled before adding -ed to maintain the short vowel sound.
When using usefulled 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 usefulled to the store." The past tense form does not change based on the subject — I usefulled, you usefulled, he/she usefulled, we usefulled, they usefulled.