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