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