Start

What is the verb?

Is it
'ser'
or
'ir'?

Conjugate:
fui
fuiste
fue
fuimos
fuistes
fueron

Is it
tener, estar,
andar, poner,
poder, saber,
venir, querer,
caber or
haber?

Find the stem:
tener = tuv-
estar = estuv-
andar = anduv-
poner = pus-
poder = pud-
saber = sup-
venir = vin -
querer = quis-
caber = cup-
haber = hub-

Find the ending:
-e
-iste
-o
-imos
-isteis
-ieron

Put stem and
the ending
together. If you
have two i's
together,
delete one.

It it
hacer?

Find the stem:
hacer = hic-

Are you
conjugating for
él, ella or
usted?

Then the
stem is
hiz-

Is it
decir, traer,
conducir, or
a -ducir verb?

Find the stem:
decir = dij-
traer = traj-
conducir = conduj-
-ducir = -duj-

Find the ending:
-e
-iste
-o
-imos
-isteis
-eron

Is it an
-ir verb?

Is it
stem-changing
in the
present?
(not o’r)

Is ir
ver or
dar?

Conjugate:
vi/di
viste/diste
vio/dio
vimos/dimos
visteis/disteis
vieron/dieron

Is it an -er
verb?

Is it an
-ar verb?

Does it
end in
-car?

Does it
end in
-gar?

Does it
end in
-zar?

Get the stem:
Drop the -ar and
you have your stem

Your stem changes:
change the 'c' to 'qu'

Your stem changes:
change the 'g' to 'gu'

Your stem changes:
change the 'z' to 'c'

Find the ending:
-Ž
-aste
-—
-amos
-asteis
-aron

Are you
conjugating for
Žl/ella/usted or
ellos/ellas/
ustedes?

Is it
an e>ie
or e>i
verb?

Is it an
o>ue
verb?

The stem changes:
the last 'e' of the stem
changes to 'i'

The stem changes:
the last 'o' of the stem
changes to 'u'

Find the ending:
-’
-iste
-i—
-imos
-isteis
-ieron

Get the stem:
Drop the -ir and
you have your stem

Get the stem:
Drop the -er
you have your stem

Does the
stem end in
a vowel?
(not gu)

Find the ending:
-’
-’ste
-y—
-’mos
-’steis
-yeron

End

Not a Verb

What is your conjugation?

End

What is your conjugation?

End

Find the ending:
-e
-iste
-o
-imos
-isteis
-ieron

What is your conjugation?

End

Put stem and
the ending
together.

What is your conjugation?

End

What is your conjugation?

End

Put stem and
the ending
together.

What is your conjugation?

End

Put stem and
the ending
together.

What is your conjugation?

End

Are you
conjugating
yo?

Yes

Yes

No

Yes

Yes

No

Yes

No

Yes

No

No

No

Yes

No

No

No

No

Yes

No

Yes

Yes

No

Yes

Yes

No

No

No

Yes

Yes

Yes

Yes

No

No

Yes

No