This verb follows the consonant-vowel-consonant (CVC) pattern. The final consonant is doubled before adding -ed to maintain the short vowel sound.
Diagram is regular. It follows the Consonant Doubling rule.
Use past time markers: "Yesterday, she diagrammed to the store."
No. Use "did not diagram" (not "did not diagrammed").
The verb diagram follows the standard English past tense conjugation rule. When forming the past tense, diagram becomes diagrammed. This follows the Consonant Doubling pattern, which is one of the most common conjugation rules in English.
Understanding why diagram becomes diagrammed helps with spelling and pronunciation. This verb follows the consonant-vowel-consonant (CVC) pattern. The final consonant is doubled before adding -ed to maintain the short vowel sound.
When using diagrammed 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 diagrammed to the store." The past tense form does not change based on the subject — I diagrammed, you diagrammed, he/she diagrammed, we diagrammed, they diagrammed.