خواهرم یک عکس از درخت و گل فرستاده است.

A natural pronunciation is:

khâharam ye aks az deraxt-o gol ferestâde ast

A slightly more careful/formal pronunciation would be:

khâharam yek aks az deraxt va gol ferestâde ast

A few notes:

• خواهرم = khâharam
• یک is often pronounced ye in everyday speech
• و is written as va, but between words it is very often pronounced o
• درخت = deraxt or derakht
• فرستاده است = ferestâde ast

Here is the structure:

• خواهرم = my sister
• یک = a / one
• عکس = photo / picture
• از = of / from
  In this sentence, it gives the meaning of
• درخت و گل = tree and flower
• فرستاده است = has sent

So the sentence is literally:

My sister a photo of tree and flower has sent.

That is normal Persian word order.

In Persian, possessives are often added directly to the noun as endings.

• خواهر = sister
• -م = my

So:

• خواهرم = my sister

This -م is called a possessive ending or enclitic. You do not need a separate word for my here.

Compare:

• خواهر = sister
• خواهرم = my sister
• خواهرت = your sister
• خواهرش = his/her sister

It can mean either, depending on context.

In this sentence, یک عکس most naturally means a photo.

So:

• یک = one when you want to count
• یک = a/an when you are just introducing something indefinite

Here it works like English a.

In everyday speech, یک is very often pronounced یه / ye.

Yes, از very often means from, but it has other uses too.

After عکس, Persian commonly uses از to mean of:

• عکس از درخت = a photo of a tree

So in this sentence, از does not mean from. It marks what is shown in the photo.

This is a very common pattern in Persian:

• عکس از... = photo of...
• فیلمی از... = a film about / showing...
• تصویری از... = an image of...

That is a very common question.

را often marks a specific or definite direct object. But in this sentence, یک عکس is indefinite: a photo, not the photo.

So it is very normal to say:

• خواهرم یک عکس ... فرستاده است

without را.

If the photo were specific and already known, را would be more likely:

• خواهرم آن عکس را فرستاده است = My sister has sent that photo

So the absence of را fits the indefinite meaning of یک عکس.

فرستاده است is the present perfect.

It means:

• has sent

It is formed from:

• فرستاده = past participle, sent
• است = is/has as part of the perfect construction

So:

• فرستاده است = has sent

This is very similar in meaning to English has sent.

Because Persian normally follows subject–object–verb order.

In this sentence:

• خواهرم = subject
• یک عکس از درخت و گل = object
• فرستاده است = verb

So Persian puts the verb at the end:

My sister / a photo of a tree and a flower / has sent

That is one of the biggest word-order differences from English.

Because that is how Persian commonly sounds in normal speech.

• The written form is و
• In careful citation form, you can say va
• In connected everyday speech, it is very often pronounced o

So:

• درخت و گل is usually pronounced deraxt-o gol

Both are related to the same written word و, meaning and.

Yes, very often.

In everyday spoken Persian, است is commonly reduced or omitted, especially after a perfect form.

So instead of:

• فرستاده است

you may hear:

• فرستاده‌ست
• or even just فرستاده

depending on the speaker and the level of formality.

But in writing and careful speech, فرستاده است is completely standard.

Literally, the nouns are singular:

• درخت = tree
• گل = flower

So the most direct reading is:

• a tree and a flower

But Persian often relies on context more than English does. In some situations, singular nouns can sound fairly general. Still, if you want a basic literal understanding, read it as tree and flower, singular.

If Persian wanted to be clearly plural, it could say:

• درخت‌ها و گل‌ها = trees and flowers

Yes.

عکس can mean:

• a photograph
• a picture
• an image
• a photo sent digitally

So unless the context makes it clear, عکس does not have to mean a printed physical photo. It can easily mean a picture sent by phone or online.

Yes.

Both mean my sister:

• خواهرم
• خواهرِ من

But خواهرم is shorter and more natural in ordinary speech.

A useful contrast:

• خواهرم = my sister
• خواهرِ من = my sister, often a bit more explicit or emphatic

So in a simple sentence like this, خواهرم is the most natural choice.