In addition to the general rules
Bozyo mentioned above when conjugating Spanish verbs in the future tense, there are some
irregular verbs that use a modified form of the
infinitive. The following verbs drop the letter
e from the infinitive ending:
caber (to fit
into)
poder (to
be able)
querer (to
want)
saber (to
know)
Example:
caber
cabré
cabrás
cabrá
cabremos
cabréis
cabrán
In these verbs, the vowel of the infinitive endings
-er and
-ir changes to
d:
poner (to put)
salir (to go out)
tener (to have)
venir (to
come)
Example:
poner
pondré
pondrás
pondrá
pondremos
pondréis
pondrán
In these verbs, the letters
e and
c are dropped from the infinitives before adding the future-tense endings:
decir (to
say)
hacer (to
do)
Example:
hacer
haré
harás
hará
haremos
haréis
harán