במסיבת ההחלפות העברנו הלאה פריט עונתי.

Because מסיבת ההחלפות is a construct phrase in Hebrew.

• מסיבה = a party
• מסיבת ... = party of ...
• החלפות = exchanges / swaps

So מסיבת ההחלפות literally means the party of the swaps, or more naturally, the swap party / exchange party.

The prefix ב־ means in or at, so:

• במסיבת ההחלפות = at the swap party

That is normal in a construct phrase.

In Hebrew, when two nouns are linked like this, the definiteness of the whole phrase is usually shown on the second noun, not the first one.

So:

• מסיבת החלפות = a swap party
• מסיבת ההחלפות = the swap party

Even though מסיבת itself does not have ה־, the whole phrase is definite because ההחלפות is definite.

העברנו is a past tense verb meaning we passed, we transferred, or we handed over, depending on context.

It is:

• 1st person plural
• past tense
• so it already includes the subject we

That is why Hebrew does not need a separate word for we here.

It comes from the root ע-ב-ר, which is connected to the general idea of passing, crossing, or moving from one side/place to another.

In this form, the verb means something like:

• to pass something along
• to transfer
• to move something onward

So in this sentence, העברנו fits very naturally with the idea of handing an item on to someone else.

הלאה means onward, along, or forward.

Here it adds the sense of passing something on rather than simply moving it.

So:

• העברנו פריט עונתי = we passed/transferred a seasonal item
• העברנו הלאה פריט עונתי = we passed a seasonal item along

In English, passed along is probably the most natural match.

Because Hebrew verbs usually include the subject inside the verb form itself.

העברנו already means we passed.

Compare:

• העברתי = I passed
• העברת = you passed
• העברנו = we passed

So adding a separate אנחנו would only be for emphasis:

• אנחנו העברנו הלאה... = We are the ones who passed along...

Because את is used before a definite direct object, and פריט עונתי here is indefinite.

• פריט עונתי = a seasonal item
• הפריט העונתי = the seasonal item

So:

• העברנו הלאה פריט עונתי = correct
• העברנו הלאה את הפריט העונתי = would mean we passed along the seasonal item

No את with an indefinite object.

Because in Hebrew, adjectives normally come after the noun they describe.

So:

• פריט = item
• עונתי = seasonal
• פריט עונתי = a seasonal item

Also, Hebrew adjectives must agree with the noun in:

• gender
• number
• definiteness

Here both words are:

• masculine
• singular
• indefinite

That is why פריט עונתי matches correctly.

Yes. Hebrew word order is more flexible than English word order.

This sentence begins with a prepositional phrase:

• במסיבת ההחלפות = at the swap party

Then it gives the action:

• העברנו הלאה = we passed along

Then the object:

• פריט עונתי = a seasonal item

That order sounds natural and clear. Other orders are possible, but they may shift the emphasis. For example:

• העברנו הלאה פריט עונתי במסיבת ההחלפות = more emphasis on the action first
• פריט עונתי העברנו הלאה במסיבת ההחלפות = stronger emphasis on a seasonal item

A simple pronunciation guide would be:

bim-si-VAT ha-ha-khla-FOT he-e-VAR-nu ha-LA priT o-na-TI

A few notes:

• במסיבת = bimsiVAT
• החלפות has the Hebrew letter ח, which is a throaty sound not found in normal English
• העברנו is roughly he-e-VAR-nu
• עונתי is o-na-TI

The main stresses are usually on:

• מסיבת
• החלפות
• העברנו
• עונתי