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