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