Comparamos la mesa redonda con la presentación editorial.

Spanish often leaves out subject pronouns when the verb ending already shows who is doing the action.

Here, comparamos ends in -amos, which tells you the subject is nosotros/nosotras = we.

So:

• Comparamos la mesa redonda... = We compare / We compared the round table...
• Nosotros comparamos la mesa redonda... is also possible, but it adds emphasis, contrast, or clarity.

In normal Spanish, leaving out nosotros is very common.

It can mean either one, depending on context.

For many -ar verbs, the nosotros/nosotras form is the same in:

• the present tense: we compare
• the preterite: we compared

So comparamos could be:

• We compare the round table with the editorial presentation
• We compared the round table with the editorial presentation

Usually, the rest of the conversation, a time word, or the situation tells you which meaning is intended.

For example:

• Hoy comparamos... → probably we compare
• Ayer comparamos... → probably we compared

Because both mesa and presentación are feminine singular nouns, and here they are being treated as specific things.

• la mesa redonda
• la presentación editorial

Spanish uses articles very often, sometimes more often than English does. In this sentence, the speaker is not talking about a round table in general or an editorial presentation in general, but about specific ones.

Also, both nouns are feminine:

• mesa is feminine
• presentación is feminine

That is why the article is la in both cases.

Because adjectives usually have to agree with the noun in gender and number.

• mesa is feminine singular
• so the adjective must also be feminine singular: redonda

Compare:

• el libro rojo
• la mesa roja

So:

• mesa redonda = feminine singular noun + feminine singular adjective

In Spanish, most descriptive adjectives normally come after the noun.

So:

• presentación editorial is the usual order
• noun first: presentación
• adjective after: editorial

Also, editorial here is an adjective meaning something like editorial/publishing-related.

A useful detail: editorial has the same singular form for masculine and feminine.

So you can have:

• el texto editorial
• la presentación editorial

Only the plural changes:

• los textos editoriales
• las presentaciones editoriales

Because Spanish commonly uses comparar algo con algo to mean to compare something with something.

Structure:

• comparar + thing 1 + con + thing 2

So in your sentence:

• Comparamos la mesa redonda con la presentación editorial

That means:

• We compare / compared the round table with the editorial presentation

You may also see comparar A y B in some contexts, but comparar A con B is a very standard and clear pattern.

The direct object is la mesa redonda.

That is the thing being directly compared.

Then con la presentación editorial gives the second item in the comparison.

So the structure is:

• Comparamos = verb
• la mesa redonda = direct object
• con la presentación editorial = prepositional phrase showing what it is compared with

This is very similar to English:

• We compare the round table with the editorial presentation

Not always. In Spanish, mesa redonda can be:

1. a literal round table
2. an idiomatic expression meaning a round-table discussion or panel discussion

So the exact meaning depends on context.

In many real-life situations, especially in academic, cultural, or professional settings, mesa redonda often means a discussion event rather than a piece of furniture.

Since you said the meaning is already shown to the learner, the important grammar point is that the phrase behaves like a normal feminine singular noun phrase:

• la mesa redonda

Yes, absolutely.

That version is grammatically correct. It simply includes the subject pronoun nosotros.

Spanish usually prefers:

• Comparamos la mesa redonda con la presentación editorial

But you can say:

• Nosotros comparamos la mesa redonda con la presentación editorial

if you want to:

• emphasize we
• contrast with someone else
• make the subject extra clear

For example:

• Ellos analizan el informe, pero nosotros comparamos la mesa redonda con la presentación editorial.

Yes, Spanish word order is somewhat flexible, but the basic order here is the most natural:

• Comparamos la mesa redonda con la presentación editorial.

You might change the order for emphasis, but not all changes sound equally natural.

For example, this is possible in a marked context:

• La mesa redonda la comparamos con la presentación editorial.

That gives special emphasis to la mesa redonda.

For a learner, the safest and most neutral version is the original one.

A simple approximation is:

kom-pa-RA-mos la ME-sa re-DON-da kon la pre-sen-ta-THYON e-di-to-RYAL

A few notes for Spain Spanish:

• c before a, o, u sounds like k
  
  • comparamos
• c before i or e is often pronounced like the th in think in most of Spain
  
  • presentación
• the stress falls on:
  • compaRAmos
  • MEsa
  • reDONda
  • presentaCIÓN
  • editoRIAL

If you are learning Peninsular Spanish, that th sound in -ción is very typical.