vs 

QUICK ANSWER
"If necessary" is a phrase which is often translated as "si es necesario", and "to" is a preposition which is often translated as "a". Learn more about the difference between "if necessary" and "to" below.
if necessary(
ihf
 
neh
-
suh
-
seh
-
ri
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. si es necesario
Add the eggs to the batter and mix. You can add some milk, if necessary.Añada los huevos a la mezcla y bata. Puede agregar leche, si es necesario.
b. si hace falta
If necessary, I can help you with anything you need.Si hace falta, puedo ayudarte con lo que necesites.
Copyright © 2025 Dictionary Media Group, Inc.
to(
tu
)
A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
preposition
a. a
I'm going to your house.Voy a tu casa.
b. hacia
She walked to the woods.Caminó hacia el bosque.
a. hasta
I would run to your house right now just to see you!¡Correría hasta tu casa ahora mismo solo para verte!
a. a
I just came to say hello.Solo vine a saludar.
a. de
All of those books belonged to my grandfather.Todos estos libros eran de mi abuelo.
a. menos
It is a quarter to six.Son las seis menos cuarto.
a. por
The birth ratio is 107 boys to 100 girls.La proporción de nacimientos es de 107 niños por 100 niñas.
a. a
Variable A is greater or equal to variable B.La variable A es mayor o igual a la variable B.
a. para
To my surprise, he did not recognize me.Para mi sorpresa, él no me reconoció.
a. por
Here's to the birthday girl! Cheers!¡Por la cumpleañera! ¡Salud!
a. a
Turn to the left to exit.Gira a la izquierda para salir.
a.
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
no direct translation
I learned to drive when I was 17.Aprendí a manejar a los 17 años.
We need to work faster.Tenemos que trabajar más rápido.
a.
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
no direct translation
I didn't want to tell you but I felt I had to.No quería decírtelo pero me vi obligada a hacerlo.
It's my party and I'll cry if I want to.Es mi fiesta y lloraré si quiero.
Copyright © 2025 Dictionary Media Group, Inc.