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