Η μεζούρα είναι στην τσάντα.

Η is the feminine singular definite article, so here it means the.

• η μεζούρα = the measuring tape / the measuring cup (depending on context)
• It is capitalized here only because it is the first word of the sentence.
• In the middle of a sentence, it would normally be written η.

Because μεζούρα is a feminine noun in Greek.

Greek nouns have grammatical gender, and the article has to match the noun:

• ο = masculine the
• η = feminine the
• το = neuter the

So:

• η μεζούρα = correct
• ο μεζούρα or το μεζούρα = incorrect

A lot of feminine nouns end in -α, as μεζούρα does, though endings are only a clue, not a perfect rule.

είναι is the present-tense form of to be used here for is.

So:

• Η μεζούρα είναι... = The measuring tape is...

Greek does not work exactly like English in the way verbs and subjects are expressed. In this sentence, the subject is already clearly stated as η μεζούρα, so nothing else is needed.

Also, είναι is the normal 3rd-person form used for:

• he/she/it is
• they are

The noun in the sentence tells you which meaning is intended.

Because Greek usually does not need a subject pronoun when the subject is already clear.

In English, we say:

• It is in the bag

But in Greek, if the subject noun is present, you just say:

• Η μεζούρα είναι στην τσάντα

You do not need a separate word for it because η μεζούρα already tells you what is being talked about.

στην is a very common contraction of:

• σε = in, at, to
• την = the (feminine accusative singular)

So:

• σε την → στην

That means:

• στην τσάντα = in the bag

This contraction is standard and very common in everyday Greek.

Because after the preposition σε, Greek uses the accusative case.

So the article changes:

• nominative: η τσάντα
• accusative: την τσάντα

That is why:

• Η μεζούρα = the measuring tape (subject)
• στην τσάντα = in the bag

A useful thing to notice: the noun τσάντα itself looks the same here, but the article changes and shows the case.

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

So:

• η τσάντα = nominative
• την τσάντα = accusative

The noun τσάντα does not change, but the article does.

This is very common in Modern Greek, so learners often need to watch the article, not just the noun ending.

Both στη and στην can exist, but the final -ν is kept before certain sounds.

Here the next word is τσάντα, which begins with τσ, so Greek keeps the -ν:

• στην τσάντα = correct and expected

This final -ν helps the sentence sound natural and follows normal spelling rules.

Not always. σε is a broad preposition and can mean:

• in
• at
• to
• sometimes on, depending on context

In this sentence, it means in because it shows location inside something:

• στην τσάντα = in the bag

So you have to use context to choose the best English translation.

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

The most neutral order here is:

• Η μεζούρα είναι στην τσάντα.

But Greek can change the order for emphasis, for example:

• Στην τσάντα είναι η μεζούρα.

That might sound more like:

• The measuring tape is in the bag
• or It’s in the bag that the measuring tape is

The original sentence is the most straightforward, neutral version for a learner to remember.

A rough pronunciation is:

• ee me-ZOO-ra EH-neh steen TSAN-da

A few helpful notes:

• η / Η sounds like ee
• ζ sounds like z
• ού shows the stress in μεζούρα
• τσ sounds like ts
• ντ in τσάντα is often pronounced like d in normal speech, so τσάντα can sound close to TSAN-da

The written stress marks show you where the emphasis goes:

• μεζούρα
• είναι
• τσάντα

If you say στην τσάντα, you mean in the bag — a specific bag.

Greek often uses the definite article where English does, and sometimes even where English would not.

So here:

• στην τσάντα = in the bag

If you removed the article, the meaning would change or sound incomplete depending on context. The sentence as given is talking about a specific bag, so the article is natural and correct.