Understand say do draw can take put stand give be go do think глаголы во 2 форме и в 3.

Understand - Understood - Understood
Say - Said - Said
Do - Did - Done
Draw - Drew - Drown
Can - Could - Could
Take - Took - Taken
Put - Put - Put
Stand - Stood - Stood
Give - Gave - Given
Be - Was/Were - Been
Go - Went - Gone
Do -Did - Done
Think - Thought - Thought

Understand understood understood
say said said
do did done
draw drew drawn
take took taken
put put put
stand stood stood
give gave given
be was(were) been
go went gone
think thought thought

can не знаю