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