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