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A person using a magnifying glass to look closely at a small plant in a pot.

comprobarlo

kom-pro-BAR-lo

verbA2stem-changing (o to ue) ar
to check it?verifying a fact or situation,to verify it?ensuring something is correct
Also:to prove it?demonstrating the truth of something,to test it out?checking if a machine or theory works

Quick Reference

past Participlecomprobado
infinitivecomprobar
gerundcomprobándolo

📝 In Action

No sé si la puerta está cerrada, voy a comprobarlo.

A1

I don't know if the door is locked, I'm going to check it.

Si tienes dudas sobre el precio, podemos comprobarlo en la caja.

A2

If you have doubts about the price, we can verify it at the register.

Es un experimento difícil, pero queremos comprobarlo científicamente.

B1

It's a difficult experiment, but we want to prove it scientifically.

Word Connections

Synonyms

  • verificarlo (to verify it)
  • confirmarlo (to confirm it)
  • chequearlo (to check it (common in Latin America))

Antonyms

  • ignorarlo (to ignore it)
  • suponerlo (to assume it (instead of checking))

Common Collocations

  • puedes comprobarlo tú mismo – you can check it yourself
  • antes de comprobarlo – before checking it
  • déjame comprobarlo – let me check it

💡 Grammar Points

Two Words in One

This is a 'combo' word. It combines 'comprobar' (to check) with 'lo' (it). In Spanish, you can glue the word for 'it' directly to the end of an action word if it is in its base form (infinitive).

The Stem Change

The base verb 'comprobar' is like a 'boot verb.' When you conjugate it, the 'o' changes to 'ue' in all forms except for 'we' (nosotros) and 'you all' (vosotros).

❌ Common Pitfalls

Forgot the Accent

Mistake: "compruébalo vs compruebalo"

Correction: When you add 'lo' to a command like 'comprueba,' you must add an accent mark (compruébalo) to keep the stress on the same sound.

⭐ Usage Tips

Natural Sounding

Using 'comprobarlo' sounds much more natural than saying 'comprobar eso' (check that) when you have already mentioned what you are talking about.

🔄 Conjugations

subjunctive

present

ellos/ellas/ustedeslo comprueben
vosotroslo comprobéis
él/ella/ustedlo compruebe
nosotroslo comprobemos
túlo compruebes
yolo compruebe

imperfect

ellos/ellas/ustedeslo comprobaran
vosotroslo comprobarais
él/ella/ustedlo comprobara
nosotroslo comprobáramos
túlo comprobaras
yolo comprobara

indicative

preterite

ellos/ellas/ustedeslo comprobaron
vosotroslo comprobasteis
él/ella/ustedlo comprobó
nosotroslo comprobamos
túlo comprobaste
yolo comprobé

imperfect

ellos/ellas/ustedeslo comprobaban
vosotroslo comprobabais
él/ella/ustedlo comprobaba
nosotroslo comprobábamos
túlo comprobabas
yolo comprobaba

present

ellos/ellas/ustedeslo comprueban
vosotroslo comprobáis
él/ella/ustedlo comprueba
nosotroslo comprobamos
túlo compruebas
yolo compruebo
View All Tenses & Moods →

✏️ Quick Practice

💡 Quick Quiz: comprobarlo

Question 1 of 1

How would you say 'I want to check it'?

📚 More Resources

Word Family

comprobación(verification/check) - noun
comprobante(receipt/voucher) - noun
comprobado(proven) - adjective

Frequently Asked Questions

What is the difference between 'comprobarlo' and 'verificarlo'?

They are almost identical. 'Comprobarlo' is slightly more common in everyday speech for things like checking a lock or a price, while 'verificarlo' can sound slightly more formal or technical.