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