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