Quick answer
"Demostrar" is a transitive verb which is often translated as "to demonstrate", and "comprobar" is a transitive verb which is often translated as "to check". Learn more about the difference between "demostrar" and "comprobar" below.
demostrar(
deh
-
mohs
-
trahr
)
A transitive verb is a verb that requires a direct object (e.g. I bought a book.).
1. (to explain)
a. to demonstrate
El Sr. Bloom ahora demostrará cómo se usa el carro eléctrico.Mr. Bloom will now demonstrate how to use the electric car.
b. to show
El aeromozo demostró la manera indicada de abrocharse el cinturón.The flight attendant showed the correct way to fasten your seatbelt.
2. (to give evidence of)
a. to prove
Stephen demostró su lealtad al rey.Stephen proved his loyalty to the king.
b. to demonstrate
Los resultados del experimento demuestran que la hipótesis es correcta.The results of the experiment demonstrate that the hypothesis is correct.
3. (to present)
a. to display
Chrissy demostró sus destrezas de baile.Chrissy displayed her dancing skills.
b. to show
Por el tono del discurso que dio en la cumbre, el presidente demostró que no tiene ningún sentido común.With the speech that he gave at the summit, the president showed that he has no common sense.
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comprobar(
kohm
-
proh
-
bahr
)
A transitive verb is a verb that requires a direct object (e.g. I bought a book.).
1. (to verify)
a. to check
Vale la pena comprobar de nuevo a qué hora sale el vuelo mañana.It's worth checking again what time the flight leaves tomorrow.
2. (to demonstrate)
a. to prove
Con este estudio queremos comprobar que nuestra teoría es cierta.With this study, we want to prove that our theory is correct.
3. (to notice)
a. to realize
Ya comprobé que sí tiene muy mal carácter.I've realized that he has a very bad temper.
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