| Group | Base Words | Derived Words / IPA | Rule Mechanism | Teaching & Phonetic Notes |
|---|---|---|---|---|
| Group 1: -ing (Drop silent -e) |
give, have, come, write, blame, strive | giving /ˈɡɪvɪŋ/, having /ˈhævɪŋ/, coming /ˈkʌmɪŋ/, writing /ˈraɪtɪŋ/, blaming /ˈbleɪmɪŋ/, striving /ˈstraɪvɪŋ/ | Drop final silent -e before vowel suffix -ing | Prevents incorrect forms like *giveing or *writeing. Note write has long ī; give/have have short vowels. |
| Group 2: -ing (Doubling) |
get, let, whip, run, pat, put | getting /ˈɡɛtɪŋ/, letting /ˈlɛtɪŋ/, whipping /ˈwɪpɪŋ/, running /ˈrʌnɪŋ/, patting /ˈpætɪŋ/, putting /ˈpʊtɪŋ/ | 1-1-1 Rule: CVC doubles final stop/nasal | Doubling preserves the short vowel sound /ɛ, ɪ, ʌ, æ, ʊ/. Single letter would signal a long vowel (*wiping). |
| Group 3: -er (Doubling) |
red, big, thin, dim, wet, glad, hot, mad | redder /ˈrɛdər/, bigger /ˈbɪɡər/, thinner /ˈθɪnər/, dimmer /ˈdɪmər/, wetter /ˈwɛtər/, gladder /ˈɡlædər/, hotter /ˈhɒtər/, madder /ˈmædər/ | 1-1-1 Rule before comparative vowel suffix -er | Short vowel adjectives doubling: *glad* has CCVC base; still 1 vowel followed by 1 consonant. |
| Group 4: -y (Doubling) |
fun, sun, fog, star, mud | funny /ˈfʌni/, sunny /ˈsʌni/, foggy /ˈfɒɡi/, starry /ˈstɑːri/, muddy /ˈmʌdi/ | 1-1-1 Rule before vowel suffix -y (/i/) | star has r-controlled vowel; doubled rr preserves /ɑːr/ in derived adjective. |