to be - ser, estar
is/are- was/were - been
to have - tener
have/has - had - had
can - poder
can - could
to have to - tener que
has/have to - had to - had to
to say - decir
say/says - said - said
to do - hacer
do/does - did - done
to give - dar
give/gives - gave - given
to come - venir
come/comes - came - come
to write - escribir
write/writes - wrote - written
to study - estudiar
study/studies - studied - studied
to make - hacer
make/makes - made - made
should - deber
should - should
to want - querer
want/wants - wanted - wanted
to go - ir
go/goes - went - gone
to eat - comer
eat/eats - ate - eaten
to live - vivir
live/lives - lived - lived
to know - saber
know/knows - knew - known
to see - ver
see/sees - saw - seen
to play - jugar
play/plays - played - played
to work - trabajar
work/works - worked - worked
must - tener que
must
to find - encontrar
find/finds - found - found
to stay - quedarse
stay/stays - stayed - stayed
to lie - estar acostado
lie/lies - lay - lain
to understand - entender
understand/understands - understood - understood
to think - pensar
think/thinks - thought - thought
to speak - hablar
speak/speaks - spoke - spoken
to make - hacer
make/makes - made - made
to become - convertirse
become/becomes - became - become
to believe - creer
believe/believes - believed - believed
