Η φίλη μου πάντα βάζει αντηλιακό και παίρνει τα γυαλιά ηλίου της όταν έχει πολύ ήλιο.

Yes. φίλη is the feminine form, so η φίλη μου means my female friend.

• ο φίλος μου = my male friend
• η φίλη μου = my female friend

In real-life Greek, φίλος / φίλη can also sometimes mean boyfriend / girlfriend, so context matters. In this sentence, it most naturally means female friend.

In Greek, the short possessive words like μου, σου, του, της, μας, σας, τους usually come after the noun.

So Greek says:

• η φίλη μου = my friend
• το βιβλίο σου = your book
• τα κλειδιά της = her keys

This is the normal pattern. English puts the possessive before the noun, but Greek usually puts this kind of possessive after it.

Yes, Greek word order is more flexible than English word order.

Here, πάντα comes between the subject and the verb:

• Η φίλη μου πάντα βάζει...

That is a very natural position for πάντα. It highlights that this is something she always does.

Other word orders are possible, but they can sound slightly different in emphasis. Greek often moves words around more freely than English, especially adverbs like πάντα.

They are both in the present tense, 3rd person singular, because the subject is η φίλη μου = my friend / she.

• βάζει = she puts / she applies
• παίρνει = she takes

The present tense here expresses a habitual action, especially because of πάντα:

• πάντα βάζει... και παίρνει...
  = she always does these things

So this is not necessarily happening right now; it describes what she usually does.

Because αντηλιακό here is being used in a general, substance-like sense: sunscreen as a product, not a specific sunscreen.

Greek often leaves out the article in cases like this:

• βάζω αντηλιακό = I put on sunscreen
• πίνω νερό = I drink water

But if you mean a specific one, you can use the article:

• βάζει το αντηλιακό της = she puts on her sunscreen

So the version in your sentence sounds general and natural.

Yes. Greek commonly uses βάζω in places where English often uses put on, apply, or even wear, depending on the object.

So:

• βάζω αντηλιακό = apply sunscreen
• βάζω κρέμα = apply cream
• βάζω κραγιόν = put on lipstick

This is a very normal Greek verb choice.

The basic meaning of παίρνω is take. In this sentence, παίρνει τα γυαλιά ηλίου της means she takes her sunglasses with her or picks them up to use them.

Greek often uses παίρνω for taking an object along:

• παίρνω την τσάντα μου = I take my bag
• παίρνω ομπρέλα = I take an umbrella

If the idea were specifically that she is already wearing them, Greek might use φοράει instead.

Because γυαλιά is normally a plural-only noun in Greek, just like glasses in English.

So:

• τα γυαλιά = glasses
• τα γυαλιά ηλίου = sunglasses

Even when referring to one pair, Greek still uses the plural form.

ηλίου is the genitive singular of ήλιος.

• ήλιος = sun
• ηλίου = of the sun

So γυαλιά ηλίου literally means glasses of the sun, which is the standard Greek expression for sunglasses.

This kind of noun + genitive structure is very common in Greek.

της here means her.

So:

• τα γυαλιά ηλίου της = her sunglasses

Notice that the possessive comes after the whole noun phrase, not directly before the noun as in English.

Compare:

• ο αδερφός μου = my brother
• το σπίτι της = her house
• τα γυαλιά ηλίου της = her sunglasses

Because they are in different grammatical roles.

1. γυαλιά ηλίου
   Here ηλίου is genitive because it means of the sun.

2. έχει πολύ ήλιο
   Here ήλιο is accusative because it functions as the object of έχει in the expression έχει ήλιο.

So the base word is ήλιος, but Greek changes its form depending on its job in the sentence.

This is a common Greek weather expression.

• έχει ήλιο = it is sunny / there is sun
• έχει πολύ ήλιο = it is very sunny / there is a lot of sun

Greek often uses έχει in this impersonal way for conditions like weather or environment. It does not mean that she has a lot of sun. It is just the natural Greek way to express this idea.

There is no explicit subject here. Greek often uses 3rd person singular impersonally in weather expressions.

So όταν έχει πολύ ήλιο means:

• when it is very sunny
• when there is a lot of sun

Even though έχει can also mean he/she has, here it is part of a fixed weather-style expression.

Here πολύ agrees with ήλιο.

The noun ήλιος is masculine, and in this sentence it appears in the accusative singular: ήλιο. The matching form is πολύ:

• πολύς ήλιος = a lot of sun / much sun, as subject
• πολύ ήλιο = a lot of sun, as object

So this πολύ is not just the adverb very. Here it is functioning with the noun ήλιο and matching its form.