Second group /t/
Infinitives ending in /p/, /k/,/f/, /s/,/sh/, /ch/,/x/
First group /id/
Infinitives ending in the sounds: /t/ and /d/
watch watched
work worked
hope hoped
help helped
ask asked
finish finished
miss missed
smoke smoked
look looked
park parked
stop
stopped
wash washed
decide decided
greet greeted
invite invited
need needed
study studied
repeat repeated
suggest suggested
visit visited
wait waited
end ended
want wanted
rent rented
Third group /d/
Infinitives ending in /b/, /l/, /m/, /n/, /v/, /e/
call
called
listen listened
open opened
move moved
turn turned
boil boiled
answer answered
clean cleaned
rain rained
play played
seem seemed
learn learned
explain explained
arrive arrived