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