Η αδερφή μου εκτυπώνει τη φόρμα στο γραφείο και εγώ τη σκανάρω στο σπίτι.

Both are possible in Greek, but Η αδερφή μου is the most neutral and standard way to say my sister.

• η αδερφή = the sister
• μου = my / of me

Greek often expresses possession with the definite article plus a weak pronoun:

• η αδερφή μου = my sister
• το σπίτι μου = my house

The order μου η αδερφή can appear in speech for emphasis or in certain contexts, but it is not the normal default here.

Greek usually keeps the definite article even when a possessive meaning is expressed.

So Greek says:

• η αδερφή μου = literally the sister of me
• το βιβλίο σου = your book
• ο φίλος της = her friend

This is completely normal in Greek. English drops the article in these cases, but Greek usually does not.

μου is the weak genitive form of εγώ and here it means my.

In this sentence:

• Η αδερφή μου = my sister

Greek often uses these weak pronouns to show possession:

• μου = my
• σου = your
• του / της = his / her / its
• μας = our
• σας = your
• τους = their

So μου does not mean me here in the English sense; it functions possessively.

Because it is the direct object of the verb εκτυπώνει.

The sister is doing the action, and the form is the thing being printed. In Greek, direct objects usually appear in the accusative.

• η φόρμα = nominative, the form as subject
• τη φόρμα = accusative, the form as object

So:

• Η φόρμα είναι εδώ. = The form is here.
• Εκτυπώνει τη φόρμα. = She prints the form.

The first τη is the feminine singular accusative article, part of τη φόρμα = the form.

The second τη is a clitic object pronoun meaning it and refers back to the form.

So:

• τη φόρμα = the form
• τη σκανάρω = I scan it

This is a very common pattern in Greek: once the noun has been introduced, you can replace it with a pronoun.

In Greek, weak object pronouns normally come before the finite verb.

So Greek says:

• τη σκανάρω = literally it I-scan

This is normal Greek word order for clitic pronouns.

Compare:

• τον βλέπω = I see him
• τη θέλω = I want it / her
• το ξέρω = I know it

In English the object pronoun usually comes after the verb, but Greek places this unstressed pronoun before it.

Yes, Greek could omit εγώ because the verb ending already shows the subject:

• σκανάρω = I scan

However, εγώ is included for contrast or emphasis:

• Η αδερφή μου εκτυπώνει τη φόρμα στο γραφείο και εγώ τη σκανάρω στο σπίτι.

This gives the sense of:

• My sister prints the form at the office, and I scan it at home.

So εγώ is not required for basic grammar, but it helps highlight the contrast between my sister and I.

They are both in the present tense.

• εκτυπώνει = he/she/it prints / is printing
• σκανάρω = I scan / am scanning

In Greek, the present tense can often correspond to either the English simple present or present continuous, depending on context.

So:

• εκτυπώνει can mean prints or is printing
• σκανάρω can mean scan or am scanning

Because they have different subjects.

• Η αδερφή μου = my sister → third person singular
  so the verb is εκτυπώνει
• εγώ = I → first person singular
  so the verb is σκανάρω

Greek verbs change form depending on the subject, so you do not need a subject pronoun every time.

στο is a contraction of σε + το.

• σε = in / at / to
• το = the
• σε το becomes στο

So:

• στο γραφείο = at/in the office
• στο σπίτι = at/in the house / at home

This contraction is very common in everyday Greek.

Greek often says literally in the house / at the house where English says at home.

So:

• στο σπίτι = literally in/at the house
• idiomatically: at home

This is simply the normal Greek expression.

Both mean sister.

• αδελφή is the more traditional or formal spelling
• αδερφή is a very common modern everyday form

In spoken Greek, many people say αδερφή. A learner should recognize both.

Yes, φόρμα can mean form, especially in the sense of a document or template, depending on context. It can also mean other things in different contexts, such as shape, uniform, or tracksuit.

Greek has many words like this whose exact meaning depends on the situation. In this sentence, since the verb is εκτυπώνει and later τη σκανάρω, φόρμα is naturally understood as a document or form.

It is a borrowed verb based on English scan, adapted to Greek pronunciation and grammar.

Greek often takes foreign roots and conjugates them like Greek verbs:

• σκανάρω = I scan
• παρκάρω = I park
• σερφάρω = I surf

This is very common in Modern Greek, especially for technology-related actions.

Yes. Greek word order is more flexible than English because case endings and verb forms help show grammatical roles.

The given sentence is very natural:

• Η αδερφή μου εκτυπώνει τη φόρμα στο γραφείο και εγώ τη σκανάρω στο σπίτι.

But other orders are possible for emphasis, for example:

• Η αδερφή μου τη φόρμα την εκτυπώνει στο γραφείο και εγώ τη σκανάρω στο σπίτι.

That version gives extra emphasis to the form. However, for a learner, the original sentence is the best neutral pattern to follow.

Because Greek usually does not need subject pronouns when the verb ending already identifies the person.

• εκτυπώνει already tells you the subject is he/she/it
• from the noun Η αδερφή μου, we know it means she

So Greek often omits words like I, you, he, she unless they are needed for contrast, emphasis, or clarity.

That is why the first clause does not need αυτή, while the second clause includes εγώ for contrast.