Il sangue è rosso.

Italian often uses the definite article with nouns when talking about something in general.

So:

• Il sangue è rosso = Blood is red
• literally: The blood is red

This is very natural in Italian. English often leaves the article out in general statements, but Italian usually does not.

The choice between il and lo depends on the sound that follows.

Use il before most singular masculine nouns, including words that begin with a normal s followed by a vowel, like sangue.

• il sangue
• il sole
• il sale

Use lo before masculine singular nouns beginning with:

• z
• s + consonant
• ps
• gn
• x
• y

For example:

• lo zaino
• lo studente
• lo psicologo

Since sangue begins with sa- and not s + consonant, it takes il.

Sangue is masculine, which is why it takes il and the adjective rosso.

• il sangue
• rosso

You cannot always guess gender perfectly from the ending. Although many masculine nouns end in -o and many feminine nouns end in -a, sangue is one of those nouns whose gender simply has to be learned.

A good habit is to learn nouns together with their article:

• il sangue, not just sangue

Because rosso has to agree with sangue, and sangue is masculine singular.

Italian adjectives usually agree in gender and number with the noun they describe.

Here:

• sangue = masculine singular
• so the adjective is rosso = masculine singular

Compare:

• Il sangue è rosso. = Blood is red.
• La rosa è rossa. = The rose is red.

È means is. It is the third-person singular form of the verb essere (to be).

So the sentence breaks down like this:

• Il sangue = blood / the blood
• è = is
• rosso = red

Together: Blood is red.

The accent is important. È with an accent means is.

Without the accent, e usually means and.

So:

• è = is
• e = and

This accent helps distinguish two very common words in writing.

A simple pronunciation guide is:

eel SAHN-gweh eh ROHS-soh

A few details:

• il sounds roughly like eel
• san- sounds like sahn
• gue in sangue sounds like gweh
• è sounds like eh
• rosso has a double s, so the s is held a little longer than in English

A more Italian-like pronunciation would be approximately:

eel SAHN-gweh eh ROHS-so

with a clear, pure vowel sound in each syllable.

In sangue, gu is pronounced, so you hear a gw sound:

• sangue → SAHN-gweh

That is different from some Italian spellings where the u is not really heard in the same way.

For a learner, it is enough to remember that sangue is pronounced something like sahn-gweh.

Normally, no. That would sound incomplete or unnatural in standard Italian.

When speaking generally about blood as a substance, Italian normally says:

• Il sangue è rosso.

So even though English says Blood is red, Italian prefers the article here.

The normal, neutral word order is:

• Il sangue è rosso.

You can change word order in Italian for emphasis or poetic effect, but it would sound unusual in everyday speech.

For a learner, the best pattern to follow is:

article + noun + form of essere + adjective

So:

• Il sangue è rosso.
• Il cielo è blu.
• La neve è bianca.

In this sentence, rosso is not directly attached to the noun as in the red blood. Instead, it comes after è and tells you a quality of the subject.

This is called a predicate adjective:

• Il sangue è rosso. = The blood is red.

Compare:

• il sangue rosso = the red blood
• il sangue è rosso = the blood is red

So here, rosso comes after è because it is part of the statement about the subject.

If both the noun and adjective were plural, they would change form.

For sangue, though, the plural is not very commonly used in basic everyday sentences. Grammatically, the plural is:

• i sangui

And the adjective would become masculine plural:

• rossi

So the full plural would be:

• I sangui sono rossi.

However, in normal usage, people much more often use il sangue as an uncountable substance noun.

Yes. It is a very common and useful pattern:

definite article + noun + essere + adjective

Examples:

• Il vino è buono. = Wine is good.
• Il mare è calmo. = The sea is calm.
• La neve è fredda. = Snow is cold.

So Il sangue è rosso is a great model sentence for learning basic Italian grammar.