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