There are some verbs in Spanish that
are more or less totally irregular, but fortunately they are few in number,
and you already know most of them. Here they are for review:
SER (to be- origin
or characteristic): soy, eres, es,
somos, soís, son
IR (to go):
voy, vas, va, vamos, váis, van
ESTAR (to be- condition
or location): estoy, estás, está,
estamos, estáis, están
*DAR is irregular only
in the YO form, but it fits well with these other "oy" verbs.
DAR* (to give): doy,
das, da, damos, dáis, dan
There's a quick, easy review at studyspanish.com
for these verbs. Of course, as long as you are there, take
The other irregular verb you need to
know is "HABER".
Haber has a few different meanings, and depending on your level you may
need to know one, a few or all. The present tense forms of it are:
has, ha, hemos, háis, han
(muy irregular, ¿no?)
It also has an "impersonal form" of
is, as far as I know, the only verb with this "extra" form.
Here are the uses:
HABER is used "impersonally" to mean there
is/are (HAY) [go review at studyspanish.com],
there was/were (HABÍA), there would
be (HABRÍA), there will be (HABRÁ).
QUE + an infinitive(or HABÍA
QUE, HABRÍA QUE, HABRÁ QUE)
is used to mean IT IS (was,
would be, will be, etc.) NECESSARY
to do something.
Hay que estudiar
= It is necessary to study more.
It is also used in perfect tenses, meaning
"to have" ( He comido. = I have eaten. Habían salido. = They
had left.; etc.).
Finally, it is used idiomatically in two
de + the infinitive = should do....
(He de comer = I should eat.)
+ the infinitive = must do... (He que trabajar
= I must work.)