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