1. Group #1 (one word)
1.1. cut
1.2. cost
1.3. hit
1.4. hurt
1.5. let
1.6. put
1.7. shut
2. Group #3(three words)
2.1. i-a-u
2.1.1. begin/began/begun
2.1.2. drink/drank/drunk
2.1.3. ring/rang/rung
2.1.4. sing/sang/sung
2.1.5. swim/swam/swum
2.2. e-wn
2.2.1. blow/blew/blown
2.2.2. draw/drew/drawn
2.2.3. fly/flew/flown
2.2.4. grow/grew/grown
2.2.5. know/knew/known
2.2.6. show/showed/shown
2.2.7. throw/threw/thrown
2.3. with "en"
2.3.1. Wake/woke/woken
2.3.2. be/was-were/been
2.3.3. beat/beat/beaten
2.3.4. bite/bit/bitten
2.3.5. break/broke/broken
2.3.6. choose/chose/chosen
2.3.7. eat/ate/eaten
2.3.8. fall/fell/fallen
2.3.9. forget/forgot/forgotten
2.3.10. give/gave/given
2.3.11. hide/hid/hidden
2.3.12. ride/rode/ridden
2.3.13. rise/rose/risen
2.3.14. see/saw/seen
2.3.15. speak/spoke/spoken
2.3.16. steal/stole/stolen
2.3.17. take/took/taken
2.3.18. write/wrote/written
3. Group #2 (two words)
3.1. with "t"
3.1.1. sleep/slept
3.1.2. keep/kept
3.1.3. dream/dreamt
3.1.4. spell/spelt
3.1.5. sit/sat
3.1.6. get/got
3.1.7. shoot/shot
3.1.8. lose/lost
3.1.9. build/built
3.1.10. spend/spent
3.1.11. send/sent
3.1.12. lend/lent
3.2. with "d"
3.2.1. find/found
3.2.2. have/had
3.2.3. hear/heard
3.2.4. hold/held
3.2.5. make/made
3.2.6. pay/paid
3.2.7. read/read
3.2.8. say/said
3.2.9. sell/sold
3.2.10. stand/stood
3.2.11. tell/told
3.3. inf/past participle same
3.3.1. come/came
3.3.2. run/ran
3.3.3. become/became
3.4. with "ught"
3.4.1. think/thought
3.4.2. fight/fought
3.4.3. teach/taught
3.4.4. bring/brought
3.4.5. buy/bought
3.4.6. catch/caught