Ni same pensas pri la filmo.

Ni means we.

Esperanto personal pronouns are very regular:

• mi = I
• vi = you
• li = he
• ŝi = she
• ĝi = it
• ni = we
• ili = they

So Ni same pensas... starts with We...

Because pensas is a conjugated verb, while pensi is the infinitive.

In Esperanto:

• -i = infinitive, like English to think
• -as = present tense, like English think / are thinking

So:

• pensi = to think
• pensas = think / are thinking

Since the subject is ni (we), you need the finite verb form:

• Ni pensas = We think

A useful point for English speakers: the verb ending does not change depending on the subject.

• mi pensas = I think
• vi pensas = you think
• ni pensas = we think
• ili pensas = they think

It is always -as for the present tense.

Yes. Same is an adverb here.

The idea is We think the same way about the film or We think similarly about the film.

In Esperanto, adverbs usually end in -e. So:

• sama = same, identical (adjective)
• same = in the same way, similarly (adverb)

Because it modifies the verb pensas (think), the adverb form is used:

• Ni same pensas = We think the same way / We think alike

Not with the same structure.

• same is an adverb: it modifies pensas
• samas is a verb form from sami or more commonly understood as to be the same

So:

• Ni same pensas = We think alike / We think the same way
• Niaj opinioj samas = Our opinions are the same

In your sentence, the point is about how we think, so same fits naturally.

Because pensi pri means to think about.

In Esperanto, many verbs commonly go with a certain preposition, just as in English. Here:

• pensi pri io = to think about something

So:

• Ni pensas pri la filmo = We think about the film

And with same added:

• Ni same pensas pri la filmo = We think the same way about the film

Because after a preposition like pri, Esperanto normally does not use the accusative -n.

Here, la filmo is the object of the preposition pri:

• pri la filmo = about the film

You would use -n for a direct object, but this is not a direct object of pensas. The phrase is built with the preposition pri instead.

Compare:

• Mi vidas la filmon. = I see the film.
  
  • Here la filmon is a direct object.

But:

• Mi pensas pri la filmo. = I think about the film.
  
  • Here la filmo follows pri, so no -n.

La is the definite article, meaning the.

So:

• filmo = film / a film
• la filmo = the film

The sentence refers to a specific film already known from context, so la is used.

Esperanto has only one article:

• la = the

There is no separate word for a/an. So filmo can mean a film or simply film, depending on context.

Filmo means film or movie.

The ending -o marks a noun in Esperanto.

This is one of the most important patterns in the language:

• -o = noun
• -a = adjective
• -e = adverb
• -i = infinitive verb

So from the same root, you might see:

• filmo = film
• filma = film-related / cinematic
• filme = in a film-like way
• filmi = to film

In your sentence, filmo is a noun, so it ends in -o.

Yes, you could say Ni pensas same pri la filmo, and it would still be understandable and natural.

Esperanto word order is fairly flexible because the grammar is shown clearly by endings and prepositions.

These are all understandable:

• Ni same pensas pri la filmo.
• Ni pensas same pri la filmo.

Both mean roughly We think the same way about the film.

The version with same before pensas may feel a little more focused on the sameness itself, but the difference is small.

It means we have the same opinion or we think similarly about the film, not merely that both of us are thinking about it.

That is the role of same.

Compare:

• Ni pensas pri la filmo. = We are thinking about the film.
• Ni same pensas pri la filmo. = We think the same way about the film.

So the sentence is about agreement in opinion, not just shared attention.

Yes. That would be another natural way to express a very similar idea.

• Ni same pensas pri la filmo. = We think the same way about the film.
• Ni havas la saman opinion pri la filmo. = We have the same opinion about the film.

The second version is a bit more explicit because it mentions opinion directly.

Notice one grammar point there:

• la sama opinio = the same opinion
• la saman opinion = direct object, so it takes -n

Not always.

In a sentence like this, English usually sounds more natural with expressions like:

• We think alike about the film.
• We think the same way about the film.
• We have the same opinion about the film.

A very literal translation with same may sound a little stiff in English, even though the Esperanto is perfectly normal.

So when learning, it helps to distinguish:

• literal form in Esperanto
• most natural wording in English

Here, same is best understood as alike or in the same way.