Ο καταναλωτής διαβάζει τη διαταγή.

Because Greek articles change form to match the noun.

In this sentence:

• ο καταναλωτής = masculine singular nominative
• τη διαταγή = feminine singular accusative

So Greek the is not one fixed word like in English. It changes for:

• gender: masculine, feminine, neuter
• number: singular, plural
• case: nominative, accusative, etc.

That is why ο and τη both mean the, but they are different grammatical forms.

Greek often shows this through case, not just word order.

In this sentence:

• ο καταναλωτής is in the nominative case, so it is the subject
• τη διαταγή is in the accusative case, so it is the direct object

So even if you did not rely on English-style word order, the grammar tells you that the consumer is doing the action and the order/command is receiving it.

διαβάζει is:

• present tense
• 3rd person singular
• from the verb διαβάζω = to read

So it means:

• he/she/it reads
• and, depending on context, also he/she/it is reading

Because the subject here is ο καταναλωτής, the full sense is the consumer reads / is reading.

It can mean either one, depending on context.

Modern Greek often uses the present tense for both:

• habitual action: reads
• action happening now: is reading

So Ο καταναλωτής διαβάζει τη διαταγή can mean either:

• The consumer reads the order
• The consumer is reading the order

Usually the surrounding context makes it clear.

Both forms can occur, but τη διαταγή is very normal in Modern Greek.

The full feminine accusative singular article is την, but the final -ν is often dropped before many consonants in everyday usage. Since διαταγή begins with δ, you will very often see and hear:

• τη διαταγή

You may also encounter:

• την διαταγή

That sounds a bit fuller or more careful, and it is not wrong.

Because many feminine nouns in -ή have the same form in the nominative and accusative singular.

So:

• η διαταγή = the order/command (subject form)
• τη διαταγή = the order/command (object form)

The noun itself stays the same; the article shows the case.

This is different from many masculine nouns, which often do change more clearly. For example:

• ο καταναλωτής = the consumer
• τον καταναλωτή = the consumer (as object)

That final -ς is a very common marker of the nominative singular for many Greek masculine nouns.

So καταναλωτής is the dictionary-style subject form:

• ο καταναλωτής = the consumer

If it were the direct object, it would normally change to:

• τον καταναλωτή

So the ending helps signal the noun's grammatical role.

No. Greek usually does not need an explicit subject pronoun unless you want emphasis or contrast.

The verb ending already tells you the person and number:

• διαβάζει = he/she/it reads

And in this sentence, the subject is already stated as:

• ο καταναλωτής

So adding a pronoun would normally be unnecessary.

The word order can change more easily in Greek than in English, because the articles and endings show the grammatical roles.

This sentence is the most neutral order:

• Subject + Verb + Object

But Greek could also say things like:

• Τη διαταγή διαβάζει ο καταναλωτής

That might sound more emphatic, as if focusing on the order.

So the original sentence is the most straightforward, neutral version, but it is not the only possible order.

You would usually look up:

• καταναλωτής for the noun consumer
• διαταγή for the noun order/command
• διαβάζω for the verb to read

Important point: verbs are normally listed in the 1st person singular form in Greek dictionaries, so you look up διαβάζω, not διαβάζει.

The accent marks show which syllable is stressed.

In this sentence:

• καταναλωτής
• διαβάζει
• διαταγή

Stress matters in Greek, both for pronunciation and for correct spelling. So the accent mark is not optional decoration; it is a normal part of the written word.