Verbs ending in a consonant followed by -y change the -y to -ied in the past tense form.
Dirty is regular. It follows the -ied Conversion rule.
Use past time markers: "Yesterday, she dirtied to the store."
No. Use "did not dirty" (not "did not dirtied").
The verb dirty follows the standard English past tense conjugation rule. When forming the past tense, dirty becomes dirtied. This follows the -ied Conversion pattern, which is one of the most common conjugation rules in English.
Understanding why dirty becomes dirtied helps with spelling and pronunciation. Verbs ending in a consonant followed by -y change the -y to -ied in the past tense form.
When using dirtied 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 dirtied to the store." The past tense form does not change based on the subject — I dirtied, you dirtied, he/she dirtied, we dirtied, they dirtied.