خواهرم کلید خانه را پیدا کرده است.

A careful pronunciation is khāharam kelid-e khāne rā peydā karde ast.

A more natural everyday pronunciation is often closer to:

khāharam kelid-e khune ro peydā karde

A few notes:

• خواهرم = khāharam
• کلیدِ خانه = kelid-e khāne
• را is formally rā, but in speech it often becomes ro
• کرده است is often shortened in speech, sometimes to karde-st or just karde depending on context

خواهرم means my sister.

It is made of:

• خواهر = sister
• -م = my

In Persian, possessive endings are often attached directly to the noun instead of using a separate word like my.

So:

• خواهر = sister
• خواهرم = my sister

You can also say خواهرِ من, which also means my sister, but خواهرم is very common and natural.

Persian does not have a definite article like English the.

So Persian usually shows definiteness through:

• context
• word order
• the object marker را
• possessive or descriptive relationships

In this sentence, کلید خانه را is understood as a specific key, so in English it is natural to translate it as the house key or the key to the house.

Literally, کلید خانه means key of the house.

In natural English, that becomes:

• the house key
• the key to the house

Persian often links nouns this way:

• first noun = the main thing
• second noun = what it is related to

So here:

• کلید = key
• خانه = house
• کلید خانه = house key / key of the house

That -e sound is called ezāfe.

Ezāfe is a very common Persian linking sound used between words, especially:

• noun + noun
• noun + adjective
• noun + possessor

So کلیدِ خانه is pronounced with an -e link:

• kelid-e khāne

But in normal spelling, ezāfe is often not written after a consonant. That is why you hear it but do not clearly see it in the script.

So:

• written: کلید خانه
• pronounced: kelid-e khāne

را is the direct object marker.

It usually marks a specific or definite direct object.

In this sentence:

• کلید خانه را = the house key as the object of the verb

So را tells you that کلید خانه is the thing being found.

It does not have a direct English translation, but it helps show grammar. A rough literal structure would be:

My sister [the house key]-OBJECT has found.

In everyday speech, را is often pronounced ro.

پیدا کرده است is the present perfect form, and here it means has found.

It is built from:

• پیدا کردن = to find
• پیدا کرده = found / having found
• است = is/has in this construction

Together:

• پیدا کرده است = has found

So the sentence means that the action has been completed and is relevant now, much like English has found.

Yes. پیدا کردن is a compound verb, and compound verbs are extremely common in Persian.

It consists of:

• پیدا = found, apparent, discovered
• کردن = to do

But together, پیدا کردن means to find.

This is very normal in Persian. Many actions are expressed with:

• a noun, adjective, or other element
• plus a light verb such as کردن

So even though it looks like two words, learners should treat پیدا کردن as a single vocabulary item meaning to find.

Persian normally uses Subject-Object-Verb order.

So this sentence is structured like:

• خواهرم = my sister
• کلید خانه را = the house key
• پیدا کرده است = has found

Literally: My sister the house key has found.

English usually uses Subject-Verb-Object, so the verb comes earlier: My sister has found the house key.

This verb-final pattern is very typical in Persian.

A very natural spoken version would be:

خواهرم کلید خونه رو پیدا کرده

Compared with the formal written version:

• خانه often becomes خونه
• را often becomes رو
• است is often dropped in conversation when the meaning is clear

So:

• formal: خواهرم کلید خانه را پیدا کرده است
• spoken: خواهرم کلید خونه رو پیدا کرده

Both mean the same thing. The spoken one just sounds more conversational.