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