کلید خانه گم شده است.

A careful pronunciation is kelid-e khâne gom shode ast.

A more natural everyday pronunciation is often closer to:

• kelid-e khune gom shode
• or kelid-e khune gom shode-st

A few notes:

• خانه is often pronounced khune in casual speech, even though the written form is khâne.
• است is often reduced or dropped in conversation.

That -e is the ezafe.

In Persian, the ezafe links a noun to another noun or to an adjective. So:

• کلیدِ خانه
• pronounced kelid-e khâne

It means something like the key of the house or the house key.

In normal Persian spelling, the ezafe is often not written, especially after a consonant. So you usually see کلید خانه, but you pronounce it kelid-e khâne.

Literally, it means key of the house.

English usually prefers:

• the house key
• the key to the house

Persian commonly uses this noun + ezafe + noun structure where English might use a compound noun or a preposition.

Persian does not have a definite article like English the.

So کلید خانه can mean:

• the house key
• the key to the house
• sometimes just house key

The exact interpretation depends on context.

If Persian wants to make something indefinite, it can use یک or sometimes -ی. But for definiteness, Persian usually just leaves it unmarked.

Because Persian normally puts the verb at the end of the clause.

This sentence is structured like:

• کلید خانه = the house key
• گم شده است = has been lost / is lost / has gotten lost

So the basic word order is very natural for Persian.

English: The house key has been lost.
Persian: House-key lost become-PERFECT is.

That final position for the verb is one of the most important word-order habits in Persian.

گم شده است is made of:

• گم = lost
• شده = become / become something
• است = is / has

So literally, it is something like:

• has become lost

In natural English, that often becomes:

• has been lost
• is lost
• has gotten lost

This is a very common Persian pattern:
adjective or result + شده است

It often describes a resulting state.

It is often translated like a passive in English, but it is not always exactly the same in feel.

English translation:

• The house key has been lost

But the Persian expression often feels more like:

• the key has become lost
• the key has gone missing

So it focuses on the resulting state, not necessarily on who did it.

If you want to clearly say who lost it, Persian often uses an active sentence, for example:

• من کلید خانه را گم کرده‌ام
• I have lost the house key

Because کلید خانه is not the direct object here.

In this sentence, کلید خانه is the thing being described as lost. It functions as the subject/topic of the sentence.

So:

• کلید خانه گم شده است = The house key has been lost

But in a sentence like:

• من کلید خانه را گم کرده‌ام
• I have lost the house key

there, کلید خانه is the direct object, so it takes را.

Yes, you can.

There is a small difference in nuance:

• گم است = is lost / is missing
• گم شده است = has gotten lost / has gone missing / has been lost

So:

• گم است focuses more on the current state.
• گم شده است often suggests a change or event leading to that state.

In many real situations, both are possible, but گم شده است can sound a little more dynamic or result-focused.

In everyday spoken Persian, very often yes.

So in conversation, people may say:

• کلید خونه گم شده
• کلید خونه گم شده‌ست

instead of the more formal written form:

• کلید خانه گم شده است

In formal writing, keeping است is normal and standard.

No. It does not say who lost it.

It only tells you the situation: the key is lost / has gone missing.

If you want to say who lost it, you need a different sentence, such as:

• من کلید خانه را گم کرده‌ام = I have lost the house key
• او کلید خانه را گم کرده است = He/She has lost the house key

So this sentence is useful when the important information is simply the result, not the person responsible.