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