Irregular 1
The past tense of have is
had
The past tense of "take" is
took
The past tense of "spend" is
spent
What do you do to most verbs to make them past tense?
add a "d" or an "ed"
The past tense of "feel" is
felt
How are irregular past tense verbs different from regular past tense verbs?
You don't just add a "d" or an "ed" you change the spelling of the word.