| Spelling Principle | Example Words | Pedagogical Explanation & Rule |
|---|---|---|
| 1-1-1 Doubling Rule | trip → tripped nip → nipping |
The base word has 1 syllable, 1 short vowel (/ɪ/), and ends in 1 consonant (p). The final consonant must be doubled before a vowel suffix (-ed, -ing) to prevent the vowel from sounding long. |
| Vowel Team Exception | spread → spreading peep → peeped beam → beams |
The base word contains a vowel team/digraph (ea in spread, beam; ee in peep). Because there are two vowel letters, the consonant is never doubled. |
| Vocalic Inflections | melted, warmed, scorched | Notice the three pronunciations of -ed: /ɪd/ in melted; /d/ in warmed; /t/ in scorched and tripped. |