Those verbs that form their
past participle with "d" or
"ed" are regular verbs.
These verbs do not
undergo substantial
changes while changing
forms between tenses
Present
Share, scare, dare
Do you want to share
this pie?
Past
Shared, scared,
dared
I am glad that we
shared that pie.
Irregular
Those verbs that undergo substantial
changes when changing forms between
tenses are irregular verbs. The changed
forms of these verbs are often
unrecognisably different from the
originals