1. consonant change
1.1. d -> t
1.1.1. bend -bent
1.1.2. build -built
1.1.3. lend - lent
1.1.4. send - sent
1.1.5. spend - spent
1.2. eep -> ept
1.2.1. keep - kept
1.2.2. sweep -swept
1.2.3. sleep -slept
1.2.4. weep -wept
1.3. Ø -> t
1.3.1. burn -burnt
1.3.2. deal - dealt *
1.3.3. dream - dreamt*
1.3.4. mean- meant*
1.4. ee -> e
1.4.1. feed -fed
1.4.2. bleed -bled
1.4.3. breed -bred
1.4.4. meet -met
1.4.5. speed -sped
1.5. eel -elt
1.5.1. kneel -knelt
1.5.2. feel -felt
2. vowel change
2.1. i -> a
2.1.1. begin- began
2.1.2. swim - swam
2.1.3. drink -drank
2.1.4. sit -sat
2.2. ow/aw -> ew
2.2.1. blow- blew
2.2.2. grow - grew
2.2.3. know - knew
2.2.4. draw-drew
2.2.5. throw -threw
2.3. ea -> o
2.3.1. break- broke
2.3.2. speak -spoke
2.4. i - u
2.4.1. dig-dug
2.4.2. sting -stung
2.4.3. stick -stuck
2.4.4. strike - struck
2.5. ive - ove
2.5.1. dive - dove
2.5.2. drive - drove
2.6. i - ou
2.6.1. fight - fought
2.6.2. find - found
2.7. ee - o
2.7.1. freeze-froze
2.8. i-o
2.8.1. ride-rode
2.8.2. rise-rose