Impersonal

(amanecer)
(anochecer)
(granizar)
(helar)
(llover)
(lloviznar)
(nevar)
(tronar)

amanece
anochece
graniza
hiela
llueve
llovizna
nieva
truena

it dawns
it gets dark
it hails
it freezes
it rains
it drizzles
it snows
it thunders


  Haber: There is/are

Simple Present:
Preterite Past:
Imperfect Past:
Future Tense:

hay
hubo
había
habrá

there are
there was
there was (being)
there will (be)



Other verbs that are used sometimes impersonally

(bastar)
(faltar)
(paracer)
(suceder)

basta
falta
parece
sucede

it's enough
it lacks, shortage
it seems
it happens