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