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"Acostada" is a form of "acostar", a transitive verb which is often translated as "to put to bed". "Tu" is a form of "tu", an adjective which is often translated as "your". Learn more about the difference between "acostada" and "tu" below.
acostar(
ah
-
kohs
-
tahr
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
a. to put to bed
Acosté a los niños, y luego me acosté yo.I put the children to bed and then went to bed myself.
a. to lay down
Acuesta a la paciente y levántale las piernas.Lay the patient down and raise her legs.
acostarse
A reflexive verb is a verb that indicates that the subject performs an action on itself (e.g., Miguel se lava.).
4. (to recline)
a. to lie down
Se acostó en la arena y se puso la camisa en la cabeza.She lay down in the sand and put her shirt over her head.
tu(
too
)An adjective is a word that describes a noun (e.g., the big dog).
1. (informal) (possessive)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).