Η ακρόαση ελληνικών με βοηθάει να μιλάω καλύτερα.

Ακρόαση is a noun. It means listening, hearing, or sometimes listening practice, depending on context.

So Η ακρόαση ελληνικών is literally something like the listening to Greek. Greek often uses a noun like this where English might prefer a gerund such as listening.

A more verb-like version would be Το να ακούω ελληνικά..., which is also natural.

Greek uses the definite article much more often than English, especially with abstract nouns and general activities.

So Η ακρόαση ελληνικών sounds normal and natural in Greek, even though English would usually leave out the.

Without the article, ακρόαση ελληνικών can still appear in certain contexts, but η ακρόαση ελληνικών is the more normal full sentence form.

Because ελληνικών is in the genitive plural, and it depends on the noun ακρόαση.

The structure is basically:

• ακρόαση ελληνικών = listening of Greek

This is different from a sentence with the verb ακούω:

• Ακούω ελληνικά = I listen to Greek / I hear Greek

There, ελληνικά is the direct object.
Here, ελληνικών is linked to the noun ακρόαση.

Formally, it is the genitive plural of the adjective ελληνικός. But here it is being used substantively, meaning it functions like a noun.

So ελληνικών means something like:

• of Greek things
• of Greek language material
• of Greek speech

In natural English, you would not translate it so literally. But grammatically, that is what is happening.

Because βοηθάω / βοηθώ takes a direct object for the person being helped in Modern Greek.

So:

• με βοηθάει = it helps me
• σε βοηθάει = it helps you
• τον βοηθάει = it helps him

English speakers often expect something like to me, but Greek does not use that pattern here. So μου βοηθάει is not the standard form for this meaning.

Yes. Both βοηθάει and βοηθά are common and correct.

They are two present-tense forms of the same verb:

• βοηθάει
• βοηθά

The longer form -άει is very common in everyday speech. The shorter form is also standard. The meaning is the same.

Because Modern Greek normally uses να + verb where English often uses an infinitive such as to speak.

So:

• με βοηθάει να μιλάω καλύτερα

literally works like:

• it helps me that I speak better

But in real English, of course, you say it helps me speak better.

Since Modern Greek does not normally use a true infinitive in everyday language, να does this job in many structures.

Yes, it is functioning as the subjunctive, because it comes after να.

In Modern Greek, the present subjunctive often looks exactly the same as the present indicative in form. What marks it is usually να.

So:

• μιλάω = I speak / I am speaking
• να μιλάω = that I speak / to speak / be speaking

The form stays the same, but the grammar changes because of να.

This is an important Greek aspect difference.

• να μιλάω = imperfective aspect
• να μιλήσω = perfective aspect

Here, the sentence is talking about a general ongoing ability: listening to Greek helps me speak better in general. That is why the imperfective μιλάω is the natural choice.

If you used να μιλήσω, it would sound more like helping you speak on a specific occasion or manage to speak once.

So:

• να μιλάω καλύτερα = to speak better generally
• να μιλήσω καλύτερα = to speak better on a particular occasion

Because καλύτερα is an adverb, and it modifies the verb μιλάω.

You are describing how someone speaks:

• μιλάω καλά = I speak well
• μιλάω καλύτερα = I speak better

Forms like καλύτερος, καλύτερη, and καλύτερο are adjectives, so they describe nouns, not verbs.

Because Greek often leaves out subject pronouns when they are clear from the verb ending.

In μιλάω, the ending already tells you the subject is I. So εγώ is unnecessary unless you want emphasis or contrast.

For example:

• Η ακρόαση ελληνικών με βοηθάει να μιλάω καλύτερα.
  Neutral.

• Η ακρόαση ελληνικών με βοηθάει να μιλάω καλύτερα εγώ, όχι αυτός.
  Emphatic or contrastive.

Yes. This sentence is correct and natural, but there are other very common ways to express the same idea.

For example:

• Το να ακούω ελληνικά με βοηθάει να μιλάω καλύτερα.
• Ακούγοντας ελληνικά, μιλάω καλύτερα.
• Το άκουσμα ελληνικών με βοηθάει να μιλάω καλύτερα.

Among these, Το να ακούω ελληνικά... may feel especially transparent to an English learner, because it matches the verbal idea listening to Greek more directly.

The original sentence is slightly more noun-based in structure, but still perfectly normal Greek.