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