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