אם תעבירי לי את החשבונית היום, אני אעביר את הכסף מחר בבוקר.

Because תעבירי is second person singular feminine in the future tense.

So this sentence is being said to one female person:

• אם תעבירי לי... = If you (feminine singular) send/transfer me...

If you were speaking to a man, you would say:

• אם תעביר לי...

If you were speaking to more than one person, the form would change again.

Hebrew verbs often show:

• person
• number
• gender

So unlike English you, Hebrew makes these distinctions directly in the verb.

אעביר is first person singular future: I will transfer / I will send / I will pass on.

So:

• אני אעביר את הכסף = I will transfer the money

The pattern here is:

• תעבירי = you (feminine singular) will transfer
• אעביר = I will transfer

Both forms come from the same verb: להעביר.

The basic idea of להעביר is to transfer, pass, move, send over, forward.

Its exact English translation depends on context.

In this sentence:

• תעבירי לי את החשבונית probably means something like
  send me / forward me the invoice
• אני אעביר את הכסף means
  I’ll transfer the money

So Hebrew uses the same verb in both parts, even though English might choose different verbs:

• send me the invoice
• transfer the money

That is very normal.

Here את is the direct object marker. It does not mean you in this sentence.

Hebrew uses את before a definite direct object, usually when the noun has the or is otherwise specific.

So:

• את החשבונית = the invoice as a direct object
• את הכסף = the money as a direct object

You usually do not translate this את into English.

Compare:

• אני קורא ספר = I am reading a book
  no את, because book is indefinite
• אני קורא את הספר = I am reading the book
  את appears because the book is definite

The prefix ה־ is the Hebrew definite article, equivalent to English the.

So:

• חשבונית = an invoice / invoice
• החשבונית = the invoice

and

• כסף = money
• הכסף = the money

Because both nouns are definite here, they also take the direct object marker את:

• את החשבונית
• את הכסף

Yes, it could be omitted.

Hebrew often leaves out subject pronouns when the verb already makes the subject clear.

So both are possible:

• אני אעביר את הכסף מחר בבוקר
• אעביר את הכסף מחר בבוקר

Both mean I’ll transfer the money tomorrow morning.

Why include אני?

• for emphasis
• for clarity
• for contrast: if you do X, I will do Y
• because it sounds natural in conversation

So in this sentence, אני adds a bit of explicitness and balance.

That is an important difference between Hebrew and English.

In Hebrew, for a real future condition, it is normal to use future tense in both clauses:

• אם תעבירי לי את החשבונית היום, אני אעביר את הכסף מחר בבוקר.

Literally this looks like:

• If you will transfer me the invoice today, I will transfer the money tomorrow morning

But this is just normal Hebrew grammar. In natural English, we usually translate it with present tense in the if clause:

• If you send/forward me the invoice today, I’ll transfer the money tomorrow morning.

So the Hebrew future after אם is not strange—it is the standard pattern here.

לי means to me / for me.

In Hebrew, a very common order is:

• verb + indirect object + direct object

So:

• תעבירי לי את החשבונית
• literally: you-will-transfer to-me the-invoice

This is very natural Hebrew word order.

You may think of it as:

• send me the invoice rather than
• send the invoice to me

Both ideas are possible in English, but Hebrew often prefers the short pronoun לי before the direct object.

Grammatically, לי literally means to me.

In practice, depending on context, English may translate it as:

• to me
• for me

Here the most natural sense is:

• תעבירי לי את החשבונית = send/forward the invoice to me

So לי marks the person receiving the invoice.

בבוקר means in the morning.

It is made of:

• ב־ = in / at
• בוקר = morning

So:

• מחר בבוקר = tomorrow morning literally, tomorrow in-the-morning

This is a very common Hebrew time expression.

Examples:

• היום בבוקר = this morning / today in the morning
• מחר בבוקר = tomorrow morning
• בערב = in the evening

The word order is somewhat flexible.

The sentence as given is very natural:

• אם תעבירי לי את החשבונית היום, אני אעביר את הכסף מחר בבוקר.

But Hebrew can move time expressions for emphasis or style. For example:

• אם היום תעבירי לי את החשבונית, אני אעביר את הכסף מחר בבוקר.
• אני אעביר מחר בבוקר את הכסף.

Still, the original version is probably the most neutral and natural for everyday use.

So the order is flexible, but not random.

Yes, but the meaning would change.

• חשבונית = invoice
• קבלה = receipt
• חשבון = bill / account

So if the intended meaning is specifically invoice, then חשבונית is the correct word.

A learner may confuse these because they are all related to payment or money, but they are not interchangeable.

A simple pronunciation guide:

• אם תעבירי לי את החשבונית היום, אני אעביר את הכסף מחר בבוקר.
• im ta-a-vi-ri li et ha-khesh-bo-nit ha-yom, a-ni a-a-vir et ha-ke-sef ma-khar ba-bo-ker

A few notes:

• ע is often very weak or almost silent in modern Israeli Hebrew, though it may create a slight break.
• כ in הכסף here sounds like k because of the dagesh: ha-kesef
• stress:
  • ta-a-vi-RI
  • khesh-bo-NIT
  • a-a-VIR
  • ma-KHAR
  • ba-BO-ker

Only sometimes.

להעביר can mean pass in some contexts, but here invoice strongly suggests a business or digital context, so better English translations are:

• send me the invoice
• forward me the invoice
• transfer the invoice to me
  less common in English, but possible depending on context

So although pass is not impossible as a literal idea, it is usually not the best natural English translation here.

It is a basic conditional sentence:

• אם = if
• first clause = the condition
  אם תעבירי לי את החשבונית היום
• second clause = the result
  אני אעביר את הכסף מחר בבוקר

So the pattern is:

• If X happens, Y will happen.

This is one of the most useful Hebrew sentence patterns to recognize and produce.