Ez egy közösségi piknik.

In Hungarian, the verb to be is often left out in the present tense when the subject is third person and the sentence is an identification or description.

So:

Ez egy közösségi piknik. = This is a community picnic.

Hungarian does not say Ez egy közösségi piknik van. That would be wrong here.

Compare:

• Én fáradt vagyok. = I am tired.
• Te fáradt vagy. = You are tired.
• Ő fáradt. = He/she is tired.

In the third person present, the copula is usually omitted in this kind of sentence.

Word by word:

• Ez = this
• egy = a / an (or one, depending on context)
• közösségi = community, communal, or community-related
• piknik = picnic

So the structure is basically:

Ez + egy közösségi piknik
= This + a community picnic

This is a very common and important question.

• Ez egy közösségi piknik. = This is a community picnic.
• Ez a közösségi piknik. = This is the community picnic or This community picnic

In the first sentence, ez stands alone as this, and the rest is the predicate: a community picnic.

In the second, ez a goes directly with the noun phrase:

• ez a piknik = this picnic
• ez a közösségi piknik = this community picnic

So:

• Ez egy ... = This is a ...
• Ez a ... = This ...

Here, egy is acting as the indefinite article, so it means a/an.

So:

• egy piknik = a picnic

But egy can also mean one when it is stressed or when the context clearly refers to number.

For example:

• egy ember = a person
• egy ember jött can mean one person came, depending on emphasis

In Ez egy közösségi piknik, the natural reading is simply This is a community picnic.

Közösségi is an adjective meaning community, communal, or community-related.

It comes from:

• közösség = community
• -i = a common adjective-forming ending meaning something like related to or belonging to

So:

• közösség = community
• közösségi = community-related / communal

This -i ending is very common in Hungarian.

Examples:

• iskola = school → iskolai = school-related
• város = city → városi = city / urban
• közösség = community → közösségi = community-related

No. In Hungarian, adjectives before a noun do not change for gender, and Hungarian has no grammatical gender at all.

So you simply say:

• közösségi piknik = community picnic
• közösségi program = community program
• közösségi esemény = community event

Even if the noun becomes plural, the adjective usually stays the same:

• közösségi piknikek = community picnics

The plural marking goes on the noun, not on the adjective.

The sentence Ez egy közösségi piknik. is the normal, neutral word order.

Hungarian word order is more flexible than English, but it is strongly connected to focus and emphasis. In a simple beginner sentence like this, the given order is the most natural one.

So this is the standard pattern:

Ez + egy közösségi piknik
This + a community picnic

If you change the order, the sentence may sound marked, poetic, or unnatural unless there is a special context.

Normally, no. In standard Hungarian, if the predicate is a singular countable noun, you usually need egy.

So the natural sentence is:

Ez egy közösségi piknik.

Without egy, it sounds odd in ordinary speech.

There are some contexts in Hungarian where articles are omitted, but for a basic sentence like this, learners should treat egy as necessary.

A rough pronunciation guide:

• Ez = ez with e like in bed
• egy = roughly edgy without the final English y sound; more exactly, the gy is a soft consonant not found exactly in English
• közösségi = roughly kuh-zuhsh-shay-ghee, but with rounded ö vowels
• piknik = peek-neek

A few important pronunciation points:

• ö has no exact English equivalent; it is like German ö or French eu
• s in Hungarian is pronounced sh
• sz is the normal s sound of English
• ss here means a long sh sound
• gy is a soft sound, somewhat like the d in British duke or the j/dy sound in during, though not exactly

Also, Hungarian stress is very regular: it falls on the first syllable of each word.

So:

EZ EGY KÖ-zös-SÉ-gi PIK-nik