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