Vimos el camión.

Vimos comes from the verb ver, meaning to see.

In this sentence, vimos is the we form of ver in the preterite, so it means we saw.

It is the preterite tense, which is used for a completed action in the past.

So Vimos el camión refers to a specific past event: we saw the truck.

It is not the present tense. We see the truck would be Vemos el camión.

The ending -mos tells you the subject is we (nosotros/nosotras).

So:

• vi = I saw
• viste = you saw
• vio = he/she saw
• vimos = we saw
• visteis = you all saw (Spain)
• vieron = they/you all saw

That -mos ending is a very common clue that the subject is we.

Spanish often leaves out subject pronouns because the verb ending already tells you who the subject is.

Since vimos already means we saw, adding nosotros is usually unnecessary.

• Vimos el camión = normal, natural
• Nosotros vimos el camión = also correct, but more emphatic

You might include nosotros if you want contrast, for example:

• Nosotros vimos el camión, pero ellos no.
  We saw the truck, but they didn’t.

Because camión is a masculine noun, so it takes the masculine singular article el.

• el camión = the truck

You simply have to learn the noun’s gender as part of the word.

El means the, while un means a or an.

So:

• el camión = the truck
• un camión = a truck

This sentence uses el because it refers to a specific truck, not just any truck.

The accent mark shows where the stress goes: ca-MIÓN.

Without the accent, Spanish spelling rules would make you stress it differently. The written accent tells you that the final syllable is stressed.

So it is pronounced roughly like:

• ca-MYON

The ó is not a different vowel sound from o by itself; the accent mainly marks the stress.

A simple English-friendly approximation is:

• kah-MYON

More precisely:

• ca sounds like ka
• mión is one syllable with stress there

So the full sentence is approximately:

• BEE-mos el ka-MYON

In standard Spanish pronunciation:

• vimos sounds very close to bimos, because Spanish v and b are pronounced very similarly
• el is short and unstressed

Yes. In Spain, camión is the normal word for truck.

A British English speaker might often translate it as lorry.
An American English speaker would usually say truck.

So for Spain Spanish:

• camión = truck / lorry

Yes, that is completely correct.

But in normal Spanish, people usually prefer Vimos el camión unless they want extra emphasis.

So:

• Vimos el camión. = neutral, natural
• Nosotros vimos el camión. = emphasizes we

For example, if you want to contrast with someone else:

• Nosotros vimos el camión, no ellos.
  We saw the truck, not them.

No. This is a very normal Spanish word order:

• Verb + object
• Vimos
  • el camión

It matches English quite closely here: We saw the truck.

Spanish word order can change in other contexts for emphasis, but this sentence is the basic, standard order.

No. Vimos specifically means we saw in the preterite.

We have seen would normally be:

• Hemos visto

So:

• Vimos el camión = We saw the truck
• Hemos visto el camión = We have seen the truck

Both are past-related, but they are different tenses.