Η φίλη μου ιδρώνει εύκολα όταν έχει πολύ ζέστη στο λεωφορείο.

In Greek, possessive pronouns like μου usually come after the noun:

• η φίλη μου = my friend
• το βιβλίο μου = my book

So μου here means my, but it is placed after φίλη.

Also, η is the definite article the. Greek often uses the article where English does not, so η φίλη μου literally looks like the friend my, but it simply means my friend.

φίλη is in the nominative singular, because it is the subject of the sentence.

The sentence is about what the friend does:

• Η φίλη μου = the subject
• ιδρώνει = sweats

So the nominative is used because she is the one performing the action.

μου is the weak form of the first-person singular possessive/genitive pronoun. In this sentence it means my.

You will often see forms like:

• μου = my / to me
• σου = your / to you
• του / της = his, her / to him, to her

In η φίλη μου, it functions possessively: my friend.

Greek often drops subject pronouns when they are not needed, because the verb ending already shows the person and number.

• ιδρώνω = I sweat
• ιδρώνεις = you sweat
• ιδρώνει = he/she/it sweats

So ιδρώνει already tells you the subject is he/she/it, and since Η φίλη μου is present, there is no need to add αυτή.

If you did add αυτή, it would usually give extra emphasis.

ιδρώνει is the present tense, 3rd person singular, from the verb ιδρώνω = to sweat.

So:

• ιδρώνω = I sweat / I am sweating
• ιδρώνεις = you sweat
• ιδρώνει = she sweats / she is sweating

In this sentence, the present tense expresses a general habit or tendency, not just one action happening right now. So it means something like she sweats easily in such situations.

Because εύκολα is an adverb, while εύκολη is an adjective.

• εύκολος / εύκολη / εύκολο = easy
• εύκολα = easily

Here it modifies the verb ιδρώνει, so Greek needs the adverb:

• ιδρώνει εύκολα = she sweats easily

This is the same kind of difference as English easy vs easily.

όταν means when and introduces a subordinate clause:

• όταν έχει πολύ ζέστη στο λεωφορείο = when it is very hot on the bus

In Greek, όταν is commonly followed by the present tense when talking about something that happens repeatedly or in general.

So this sentence describes a repeated situation:

• She sweats easily when it is very hot on the bus.

This is a very common Greek weather/temperature expression.

• έχει ζέστη = it is hot
• έχει πολύ ζέστη = it is very hot
• έχει κρύο = it is cold

So Greek uses έχει in an impersonal way here. English and Greek structure this idea differently.

You may also hear κάνει ζέστη, which also means it is hot. Both are common, though έχει ζέστη is extremely natural in everyday speech.

Because στο is the contracted form of:

• σε + το = στο

So:

• στο λεωφορείο = on/in the bus

This kind of contraction is very common in Greek:

• σε + τη(ν) = στη(ν)
• σε + το = στο
• σε + τους = στους
• σε + τις = στις

Even though σε often means in, at, or to, with vehicles English often translates it as on:

• στο λεωφορείο = on the bus

Because nouns in Greek belong to grammatical genders, and λεωφορείο happens to be neuter.

You can tell from the article:

• το λεωφορείο = the bus

This gender is grammatical, not logical. Objects can be masculine, feminine, or neuter in Greek, and you simply learn each noun with its article.

A good habit is to memorize nouns like this:

• το λεωφορείο
• η φίλη
• ο φίλος

not just the bare noun by itself.

In this sentence, it most naturally goes with the whole situation described in the when-clause:

• όταν έχει πολύ ζέστη στο λεωφορείο

That means when it is very hot on the bus.

So στο λεωφορείο is telling you where that heat is being experienced. In practice, it also sets the scene for why she sweats. English does the same thing: when it’s very hot on the bus.

Yes. Greek word order is more flexible than English, although the given version is very natural.

The sentence:

• Η φίλη μου ιδρώνει εύκολα όταν έχει πολύ ζέστη στο λεωφορείο.

could be rearranged in some contexts, for example:

• Όταν έχει πολύ ζέστη στο λεωφορείο, η φίλη μου ιδρώνει εύκολα.

This puts more focus on the condition first: When it’s very hot on the bus, my friend sweats easily.

Greek uses word order for focus, emphasis, and style more than English does.

Yes. φίλη is the feminine form, so it means female friend.

Compare:

• ο φίλος μου = my male friend / my boyfriend in some contexts
• η φίλη μου = my female friend / my girlfriend in some contexts

Context determines whether it means simply friend or possibly a romantic partner. If the meaning shown to the learner says just my friend, then that is the intended reading here.

A rough pronunciation guide is:

ee FEE-lee moo ee-THRO-nee EV-ko-la O-tan E-chee po-LEE ZES-tee sto le-o-fo-REE-o

A few useful notes:

• η sounds like ee
• δ in ιδρώνει is like the th in this
• θ in όταν or ζέστη is like the th in think
• ζ sounds like z
• The written accent shows which syllable is stressed:
  • φίλη
  • ιδρώνει
  • εύκολα
  • όταν
  • ζέστη
  • λεωφορείο

Yes. In fact, that is the most natural reading.

Greek present tense often covers both:

• what is happening now
• what generally happens

So Η φίλη μου ιδρώνει εύκολα όταν έχει πολύ ζέστη στο λεωφορείο most naturally means a habitual or general fact:

• My friend sweats easily when it’s very hot on the bus.

It does not have to mean that she is sweating at this exact moment.