Verbs ending in -e simply add -d to form the past tense. This is the most straightforward regular rule.
Underline is regular. It follows the -d Addition rule.
Use past time markers: "Yesterday, she underlined to the store."
No. Use "did not underline" (not "did not underlined").
The verb underline follows the standard English past tense conjugation rule. When forming the past tense, underline becomes underlined. This follows the -d Addition pattern, which is one of the most common conjugation rules in English.
Understanding why underline becomes underlined helps with spelling and pronunciation. Verbs ending in -e simply add -d to form the past tense. This is the most straightforward regular rule.
When using underlined 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 underlined to the store." The past tense form does not change based on the subject — I underlined, you underlined, he/she underlined, we underlined, they underlined.