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