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"Necesito" is a form of "necesitar", a transitive verb which is often translated as "to need". "Necesito que" is a phrase which is often translated as "I need...to". Learn more about the difference between "necesito" and "necesito que" below.
necesitar(
neh
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seh
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see
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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.
necesito que(
neh
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seh
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see
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toh
keh
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. I need...to
Necesito que Felipe me ayude con la tarea de matemáticas.I need Felipe to help me with my math homework.
¡Necesito que vengas ya mismo!I need you to come right now!