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