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