Introduction
Fluir means “to flow”, and it is one of the verbs you will use again and again in Spanish. Fluir means to flow, and it is used for water, traffic, ideas and conversations: fluir por el río, fluir la conversación. It is a -uir verb: yo fluyo, él fluye, with y before the vowel endings. Its gerund is fluyendo. This page shows fluir in real sentences, in short dialogues, and in the mistakes learners make most often, and it finishes with a ten-question quiz so you can test yourself. Every sentence below comes with its English translation, and every form is the correct present-tense form unless the sentence is clearly marked as past or future. For a first taste: “Fluyo por el río hacia el mar.” — I flow through the river to the sea.
Fluir in real example sentences
The twelve sentences below are grouped by how fluir is used. Read each one out loud, then read the translation. If a sentence feels useful, copy it into your own notebook with one small change — a different time, a different person, a different place — and you have a new sentence of your own.
In the present: everyday use
These sentences use fluir in the present tense, which is how you will meet it most often: routines, facts, and things happening now.
“Fluyo por el río hacia el mar.” — I flow through the river to the sea.
“¿Fluyes con calma en la reunión?” — Do you flow calmly in the meeting?
“Fluye sin parar en la ciudad.” — He/she flows without stopping in the city.
“Nosotros fluimos como el agua en el canal.” — We flow like water in the canal.
Talking about the past
The present is not the only tense you need. These sentences show fluir in the past, so you can talk about what already happened.
“Ayer, yo fluí por el río hacia el mar.” — Yesterday, I flowed through the river to the sea. (preterite)
“Antes, él fluía con calma en la reunión.” — Before, he used to flow calmly in the meeting. (imperfect)
Plans and things already done
These sentences look forward, or look back at something already finished. Notice how the verb form changes while the meaning of fluir stays the same.
“Mañana, nosotros fluiremos sin parar en la ciudad.” — Tomorrow, we will flow without stopping in the city. (future)
“¿Tú has fluido como el agua en el canal?” — Have you flowed like water in the canal? (present perfect)
More everyday uses
Four more present-tense sentences, covering the remaining persons, so you can see the whole table in action.
“Vosotros fluís por el río hacia el mar.” — You flow through the river to the sea.
“Ellos fluyen con calma en la reunión.” — They flow calmly in the meeting.
“Yo fluyo sin parar en la ciudad.” — I flow without stopping in the city.
“Mi padre fluye como el agua en el canal.” — My father flows like water in the canal.
Fluir in context
Single sentences teach you the forms. Dialogues teach you when to use them. Read the short conversation below, then the paragraph that follows, and notice how fluir appears naturally, without anyone stopping to think about conjugation.
A short dialogue
Marta: “¿Tú fluyes con calma en la reunión?” — Do you flow calmly in the meeting?
Pedro: “Sí, yo fluyo por el río hacia el mar.” — Yes, I flow through the river to the sea.
Marta: “Nosotros fluimos como el agua en el canal.” — We flow like water in the canal.
Pedro: “Y ellos fluyen con calma en la reunión.” — And they flow calmly in the meeting.
Marta: “Vosotros fluís sin parar en la ciudad.” — You flow without stopping in the city.
Pedro: “Sí, y él fluye por el río hacia el mar.” — Yes, and he flows through the river to the sea.
A short paragraph
Fluye por el río hacia el mar, y nosotros fluimos como el agua en el canal. Yo fluyo con calma en la reunión, y ellos fluyen sin parar en la ciudad. Fluir is part of everyday life, because flow is something people do in work, at home and with friends, in the present, the past and the future.
Common mistakes with fluir
These are the errors learners actually make with fluir. Each one shows the wrong version, the right version, and why the correction matters.
Wrong: “Yo fluye por el río hacia el mar.” Right: “Yo fluyo por el río hacia el mar.” Why: The person matters: fluye is the él/ella/Ud. form, while the yo form is fluyo. Using the third-person form with yo is one of the most common beginner errors.
Wrong: “Yo fluo con calma en la reunión.” Right: “Yo fluyo con calma en la reunión.” Why: Fluir is a -uir verb: the stem vowel i becomes y before a vowel ending, so the present is fluyo and fluye, and the gerund is fluyendo. The form fluyo follows that pattern, not the plain stem plus -o.
Wrong: “Treating fluir and correr as identical in every context.” Right: “Fluir means to flow, while correr means to run, to flow.” Why: They overlap, but each has uses the other does not: fluir fits sentences such as Fluyo por el río hacia el mar, while correr belongs in a different sentence. Check the meaning you want before choosing.
Wrong: “Yo soy fluido con calma en la reunión.” Right: “Yo he fluido con calma en la reunión.” Why: Spanish perfect tenses use haber, not ser: he fluido, has fluido, ha fluido. Ser plus the participle makes a passive, not a perfect tense.
Wrong: “De niño, yo fluí sin parar en la ciudad todos los días.” Right: “De niño, yo fluía sin parar en la ciudad todos los días.” Why: For a repeated habit in the past, use the imperfect (fluía), not the preterite. The preterite (fluí) is for one finished action.
Quiz: fluir in use
Ten questions on fluir in real sentences. Choose the correct answer for each one, then check the answer key. Every answer is explained.
1. Complete the sentence: “Vosotros ______ por el río hacia el mar.” (You flow through the river to the sea.)
- (a) fluís
- (b) fluyo
- (c) fluyes
Answer: fluís — The vosotros/as form of fluir in the present tense is fluís.
2. Complete the sentence: “Ellos ______ con calma en la reunión.” (They flow calmly in the meeting.)
- (a) fluyes
- (b) fluyen
- (c) fluyo
Answer: fluyen — The ellos/ellas/Uds. form of fluir in the present tense is fluyen.
3. Complete the sentence (preterite): “Ayer yo ______ por el río hacia el mar.” (Yesterday I flowed through the river to the sea.)
- (a) fluiste
- (b) fluyó
- (c) fluí
Answer: fluí — In the preterite, the yo form of fluir is fluí.
4. Complete the sentence (imperfect): “Antes, él ______ con calma en la reunión.” (Before, he used to flow calmly in the meeting.)
- (a) fluía
- (b) fluyo
- (c) fluías
Answer: fluía — In the imperfect, the él/ella/Ud. form of fluir is fluía.
5. Complete the sentence (future): “Mañana, nosotros ______ sin parar en la ciudad.” (Tomorrow we will flow without stopping in the city.)
- (a) fluirás
- (b) fluiremos
- (c) fluiré
Answer: fluiremos — In the future, the nosotros/as form of fluir is fluiremos.
6. What does fluir mean in English?
- (a) to flow
- (b) to pretend
- (c) to run, to flow
Answer: to flow — Fluir means “to flow”. The other options are the meanings of different verbs.
7. Which sentence is correct?
- (a) Yo fluye por el río hacia el mar.
- (b) Ellos fluye con calma en la reunión.
- (c) Yo fluyo por el río hacia el mar.
Answer: Yo fluyo por el río hacia el mar. — “Yo fluyo por el río hacia el mar.” is correct. The other two sentences contain the mistakes explained in the section above.
8. How do you say “I flow through the river to the sea.” in Spanish?
- (a) Mi padre fluye como el agua en el canal.
- (b) Fluyo por el río hacia el mar.
- (c) Fluyen por el río hacia el mar.
Answer: Fluyo por el río hacia el mar. — “Fluyo por el río hacia el mar.” is the correct translation.
9. What is the nosotros form of fluir in the present tense?
- (a) fluyo
- (b) fluyes
- (c) fluimos
Answer: fluimos — The nosotros form is fluimos.
10. Which of these sentences is in the present tense?
- (a) Mañana, nosotros fluiremos sin parar en la ciudad.
- (b) Fluyo por el río hacia el mar.
- (c) Ayer, yo fluí por el río hacia el mar.
Answer: Fluyo por el río hacia el mar. — “Fluyo por el río hacia el mar.” is in the present tense. The other two are in the preterite and the future.
Frequently asked questions
How do you say 'I flow through the river to the sea' in Spanish?
Say 'Fluyo por el río hacia el mar'. For a routine, add a time expression: 'Fluyo por el río hacia el mar todos los días'.
How do you say 'He flows calmly in the meeting' in Spanish?
Say 'Él fluye con calma en la reunión'. The subject comes first, and the verb agrees with it: él takes fluye.
What is the difference between fluir and correr?
Fluir means to flow, while correr means to run, to flow. They are easy to confuse because they appear in similar situations, but they are not interchangeable: use fluir when you mean to flow, as in 'Fluyo por el río hacia el mar', and use correr for to run, to flow.
Related pages
- Full conjugation of fluir — every tense of fluir in one place.
- Fluir in the present tense — the full table and usage rules for one tense.
- Spanish verbs — the hub for every Spanish verb on VerbFlow.
- Verb quiz — test yourself on fluir and other verbs.
- Conjugation practice — drill the forms of fluir until they are automatic.