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