Мы идём вместе в парк.

This is one of the most important Russian motion-verb distinctions.

• идти / идём = to go on foot in one direction, or as a specific trip
• ходить / ходим = to go on foot habitually, repeatedly, or in no particular direction

So:

• Мы идём вместе в парк. = We are going together to the park / We’re on our way to the park
• Мы ходим вместе в парк. = We go to the park together (regularly, as a habit)

So идём is used because this sentence describes a specific movement toward a destination.

It can sometimes mean either, depending on context.

In Russian, the present tense of an imperfective verb can describe:

• something happening right now
• something planned in the near future

So Мы идём вместе в парк most naturally means:

• We are going together to the park
• or, in the right context, We’re going to the park together

If you want to be very explicit about the future, Russian often still uses this same form when the event is already arranged or about to happen.

Because this sentence expresses movement toward a place, not location inside it.

With в:

• в + accusative = into / to
• в + prepositional = in / inside

So:

• в парк = to the park
• в парке = in the park

Compare:

• Мы идём в парк. = We’re going to the park.
• Мы в парке. = We’re in the park.

Because парк is a masculine inanimate noun, and in the singular accusative, masculine inanimate nouns usually look the same as the nominative.

So:

• nominative: парк
• accusative: парк

That is why after в you get в парк, not a visibly different form.

If the noun were different, you might see a more obvious ending change.

Вместе means together.

So Мы идём вместе в парк literally means:

• We go together to the park

In natural English, that becomes:

• We’re going to the park together

It tells you that we are going as a group, not separately.

Yes. Russian word order is more flexible than English word order.

For example, all of these can work:

• Мы идём вместе в парк.
• Мы вместе идём в парк.
• В парк мы идём вместе.

The basic meaning stays the same, but the emphasis changes a little.

• Мы идём вместе в парк sounds neutral.
• Мы вместе идём в парк puts a bit more focus on together.
• В парк мы идём вместе can emphasize to the park or sound contrastive.

Yes, Russian often leaves out subject pronouns when they are clear from the verb ending.

• Идём вместе в парк. = We’re going together to the park
• Мы идём вместе в парк. = same meaning, but мы is more explicit

The ending -ём already shows first person plural: we.

So мы is not always necessary, but it may be used for:

• clarity
• emphasis
• contrast, as in Мы идём, а они остаются = We’re going, but they are staying

Because Russian has no articles.

Russian does not use words like:

• a
• an
• the

So парк can mean:

• a park
• the park

You understand which one is meant from context.

In this sentence, English usually says the park, but Russian simply says парк.

Yes. Идти normally means to go on foot.

So Мы идём вместе в парк implies that the people are walking to the park.

If they were traveling by vehicle, Russian would usually use ехать instead:

• Мы едем вместе в парк. = We’re going to the park together (by car, bus, etc.)

This is another key feature of Russian verbs of motion: the verb often tells you how the movement happens.

Идём is pronounced roughly like ee-DYOM.

A few useful points:

• ё is always stressed
• ё sounds like yo
• so идём has the stress on the second syllable

In careful spelling, it is written идём, but in many printed texts Russians often write идем without the dots. Even then, the word is still understood as идём.

Word-for-word, it is close to that, but natural English usually needs adjustment.

A very literal breakdown is:

• Мы = we
• идём = are going / go on foot
• вместе = together
• в парк = to the park

Natural English translations would be:

• We’re going to the park together.
• We are walking to the park together.

So a literal translation helps you see the structure, but a natural translation sounds better in English.

Yes, it is a very natural neutral order.

Мы идём вместе в парк sounds normal and straightforward. It presents:

1. the subject: мы
2. the action: идём
3. the manner/grouping: вместе
4. the destination: в парк

Russian allows other orders, but this one is simple and standard for learners to recognize.