QUICK ANSWER
"Necesita" is a form of "necesitar", a transitive verb which is often translated as "to need". "Es necesario" is a phrase which is often translated as "it's necessary". Learn more about the difference between "es necesario" and "necesita" below.
es necesario(
ehs
neh
-
seh
-
sah
-
ryoh
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. it's necessary
¿Quieres que pase la noche aquí contigo? - No, no es necesario. Vete a casa, papá.Do you want me to spend the night here with you? - No, it's not necessary. Go home, Dad.
b. it's needed
Es necesario un mayor esfuerzo presupuestario para sostener el sistema de salud.A greater budgetary effort is needed to help sustain the health system.
c. no direct translation
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
Es necesario que seamos más tolerantes.We should be more tolerant.
Es necesario pagar impuestos para tener buenos servicios públicos.You need to pay taxes to have good public services.
necesitar(
neh
-
seh
-
see
-
tahr
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
1. (to require)
An auxiliary verb, or helper verb, is a conjugated verb that comes before a main verb and determines the main verb's tense, mood, or aspect (e.g., I have gone.).
a. to need
Necesitan salir ya si quieren alcanzar su vuelo.You need to leave now if you want to make your flight.
