Do-did-done
Think-thought-thought
give-gave-given
have-had-had
say-said-said
see-saw-seen
be-was/were-been
build-built-built
write-wrote-written
eat-ate-eaten
swim-swam-swum
learn-learnt-learnt
send-sent-sent
buy-bought-bought
hear-heard-heard
Take-took-taken