Danas sam dala krv, a doktorica kaže da će nalaz biti gotov sutra.

In Croatian, sam is a clitic, and clitics usually take the second position in the clause.

So in:

Danas sam dala krv

the word Danas comes first, and sam naturally goes right after it.

Both Danas sam dala krv and Dala sam krv danas are possible, but the word order changes the emphasis a bit. The version in your sentence is very natural and neutral.

Dala is the feminine singular past participle of dati (to give).

Croatian past tense is formed with:

• the present tense of biti (to be) as an auxiliary
• plus the l-participle

So:

• ja sam dao = I gave (male speaker)
• ja sam dala = I gave (female speaker)

That means this sentence is spoken by a woman.

Croatian often leaves out subject pronouns when they are not needed, because the verb form already tells you who the subject is.

In sam dala, the form already means I gave, so ja is unnecessary.

You could say Danas sam ja dala krv, but that would add emphasis, something like I was the one who gave blood today.

Because krv here is the direct object of the verb dati, so it is in the accusative case.

For the noun krv:

• nominative: krv
• accusative: krv

So the form looks the same in both cases.

This expression, dati krv, is the normal way to say to give blood / donate blood.

Literally, it means gave blood, but in this context it is naturally understood as donated blood or had blood drawn, depending on context.

If the meaning already shown to the learner is I donated blood today, then dala krv fits that well.

Croatian often uses simple verb + noun combinations where English may choose a more specific verb.

A is a very common conjunction in Croatian. It often links two clauses with a sense of and, while, or and/but meanwhile, depending on context.

In this sentence:

Danas sam dala krv, a doktorica kaže...

it works like:

• and
• while
• and as for the doctor, she says...

It does not strongly mean but here. It simply connects the two pieces of information smoothly.

Doktorica is the feminine form meaning female doctor.

• doktor = male doctor / doctor in general in some contexts
• doktorica = female doctor

Since the sentence uses doktorica, we know the doctor is a woman.

Because kaže means says / is saying, and that reporting verb is happening now.

The structure is:

• doktorica kaže = the doctor says
• da će nalaz biti gotov sutra = that the result will be ready tomorrow

So the doctor is speaking now about a future event.

This is exactly like English:

• The doctor says that the result will be ready tomorrow.

Croatian future tense is often formed with:

• a form of htjeti (ću, ćeš, će...)
• plus the infinitive

Here:

• će biti = will be

So:

• nalaz će biti gotov = the result will be ready

Because the clause is introduced by da, the future marker often appears as će before the subject or verb:

• da će nalaz biti gotov sutra

This is a normal and very common structure.

Da here means that and introduces a subordinate clause.

So:

• doktorica kaže = the doctor says
• da će nalaz biti gotov sutra = that the result will be ready tomorrow

This is one of the most common uses of da in Croatian.

Nalaz is a medical term that usually means:

• test result
• finding
• report

In this sentence, it most naturally means the test result or the lab result.

So:

• nalaz će biti gotov sutra = the result/report will be ready tomorrow

Because gotov agrees with nalaz, which is a masculine singular noun.

Croatian adjectives must agree with the noun in:

• gender
• number
• case

So:

• nalaz = masculine singular
• therefore gotov = masculine singular

Compare:

• analiza je gotova = the analysis is ready
• pismo je gotovo = the letter is ready

Yes. Croatian word order is flexible, so several versions are possible.

For example:

• Doktorica kaže da će nalaz biti gotov sutra
• Doktorica kaže da će sutra nalaz biti gotov

Both are grammatical. The difference is mainly one of emphasis or rhythm.

The original sentence sounds very natural and neutral.

Yes. Biti gotov commonly means:

• to be ready
• to be finished
• to be completed

In medical or administrative contexts, it is very common:

• Nalaz je gotov. = The result is ready.
• Dokument će biti gotov sutra. = The document will be ready tomorrow.

Yes. Sutra is quite movable, depending on emphasis.

Possible versions include:

• Danas sam dala krv, a doktorica kaže da će nalaz biti gotov sutra.
• Danas sam dala krv, a doktorica kaže da će sutra nalaz biti gotov.
• Danas sam dala krv, a doktorica kaže da će nalaz sutra biti gotov.

The original version is probably the most natural everyday choice.

It has two main parts joined by a:

1. Danas sam dala krv

   • Danas = today
   • sam dala = I gave
   • krv = blood

2. doktorica kaže da će nalaz biti gotov sutra

   • doktorica kaže = the doctor says
   • da = that
   • će ... biti = will be
   • nalaz = result/report
   • gotov = ready
   • sutra = tomorrow

So grammatically, it is:

• main clause
• conjunction
• main clause + subordinate da clause