R controlled vowels

When a word contains a vowel plus an R, then the vowel is controlled by the R.  The vowel may be a static ER or a movement ER (ARE, AIR, OR, IRE, EAR).  This happens in these words: Start:  S-T-ARE-T Beer:  B-EAR Fire:  F-IRE Four:  F-OR Care:  C-AIR Fir:  F-ER Hurt:  H-ER-