Cair vs. Derrubar: Did It Fall, or Did Someone Drop It?
Describe falling and caused falls without accidentally assigning intention. Original examples and explained practice.
Real Life Portuguese · 5 min read · Updated November 2, 2026
The short answer
A glass can fall without anyone deliberately dropping it. Portuguese separates the event from a cause with caiu and derrubou. Learning who becomes the subject helps you describe a small accident clearly, whether you are explaining a spill, a windy afternoon or something that slipped off a table.
Start with the situation
Original written teaching examples, not transcripts or new recordings
Make the falling thing the subject of cair
Cair describes falling, so the person or thing that falls becomes the grammatical subject. You do not need to identify an agent. In the past, caiu works with a singular subject and caíram with a plural one. A sentence using cair reports the event; it does not establish whether anyone caused it or whether it was avoidable.
O copo caiu da mesa.
The glass fell off the table.
As folhas caíram no chão.
The leaves fell onto the ground.
Use derrubar when something causes the fall
Derrubar usually places the cause or agent in the subject position and the affected thing after the verb. A person can derrubar a glass, but wind can also derrubar a tree. This structure supplies a cause that cair alone leaves unstated. It still does not tell you that the action was deliberate; intention needs context or an additional phrase.
O vento derrubou a cadeira.
The wind knocked the chair over.
Add sem querer to explain an accident
To acknowledge your role without claiming intention, combine derrubar with sem querer. This is often clearer than avoiding the cause altogether. You can apologize, identify what fell and offer to help. Saying the object caiu is also grammatically natural, but a listener may still want to know what happened around it. The choice changes the information supplied, not the truth automatically.
Desculpa, derrubei sua água sem querer.
Sorry, I accidentally knocked over your water.
Distinguish dropping from putting something down
English drop can describe a fall, a deliberate release or a quick delivery. Portuguese does not use derrubar for every one of those situations. If you carefully place a bag on the floor, deixar or colocar may be clearer. For a delivery, say where you left the item. Choose a verb from the actual action instead of the English word alone.
Deixei sua sacola na portaria.
I dropped your bag off at the front desk.
Build two versions of the same event
Practice a pair: first name what happened to the object, then add the cause. O vaso caiu gives the event; o gato derrubou o vaso gives a possible cause. Keep the explanation separate from a guess. If you did not see what happened, acho que or não sei como lets you report the fall without pretending to know who caused it.
O vaso caiu, mas não sei como.
The plant pot fell, but I do not know how.
Try it with your own words
Say or write a Portuguese answer before opening the suggestion. Other natural answers can work; compare the meaning and situation, then read the explanation.
Original practice: You heard a crash but did not see its cause. Say a plate fell.
Show a possible answer and explanation
Um prato caiu.
Cair reports the observed result without inventing who caused it. Derrubou would need a cause supplied or understood.
Original practice: A gust knocked two cups over. Name the cause.
Show a possible answer and explanation
O vento derrubou dois copos.
The wind is the subject because it caused the fall. The cups are the objects affected by derrubou.
Original practice: You accidentally knocked over a friend’s coffee. Acknowledge it.
Show a possible answer and explanation
Desculpa, derrubei seu café sem querer.
Derrubei identifies your role and sem querer states that it was unintentional. The apology does not replace those factual details.
Original practice: You carefully left a parcel with reception. Translate dropped it off.
Show a possible answer and explanation
Deixei a encomenda na portaria.
A delivery is not a falling event. Deixar communicates the intended handover or location without suggesting that you knocked the parcel over.
Try it with your own example
Tell a short accident story, first naming what fell and then its cause. Keep practicing with the Real Life Portuguese app