This verb follows the standard English past tense rule: simply add -ed to the base form.
Microfilm is regular. It follows the Standard -ed rule.
Use past time markers: "Yesterday, she microfilmed to the store."
No. Use "did not microfilm" (not "did not microfilmed").
The verb microfilm follows the standard English past tense conjugation rule. When forming the past tense, microfilm becomes microfilmed. This follows the Standard -ed pattern, which is one of the most common conjugation rules in English.
Understanding why microfilm becomes microfilmed helps with spelling and pronunciation. This verb follows the standard English past tense rule: simply add -ed to the base form.
When using microfilmed 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 microfilmed to the store." The past tense form does not change based on the subject — I microfilmed, you microfilmed, he/she microfilmed, we microfilmed, they microfilmed.