vs 

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"To do this" is a phrase which is often translated as "para hacer esto", and "do so" is a phrase which is often translated as "hacerlo". Learn more about the difference between "to do this" and "do so" below.
to do this(
tu
 
du
 
thihs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. para hacer esto
You have to improve your serve. To do this, you need a tennis coach.Tienes que mejorar tu servicio. Para hacer esto, necesitas un monitor de tenis.
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do so(
du
 
so
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. hacerlo
Lucy pays her mother's rent, but does so despite her lack of money to feed her children well.Lucy paga el alquiler de su madre, pero lo hace a pesar de su falta de dinero para alimentar bien a sus hijos.
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