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