Puer per angiportum obscurum ad forum currit.

Puer is in the nominative singular, which is the case normally used for the subject of a Latin sentence.

So in Puer per angiportum obscurum ad forum currit, puer means the boy or a boy, and it is the one doing the action of currit.

Also, currit is third person singular—he/she/it runs—so it matches a singular subject like puer.

Because per takes the accusative case.

So:

• per angiportum = through the alley
• not per angiporto

The adjective obscurum has to agree with angiportum in:

• case: accusative
• number: singular
• gender: neuter

That is why you get:

• angiportum obscurum = a dark alley / the dark alley

The preposition ad also takes the accusative case, usually when it means to, toward, or up to.

So:

• ad forum = to the forum

This shows the destination of the movement. The boy is running toward the forum.

They show two different parts of the movement:

• per angiportum obscurum = the route or path: through a dark alley
• ad forum = the goal or destination: to the forum

So the sentence gives both:

1. where the boy is going through
2. where he is going to

In Latin, adjectives can come before or after the noun. Word order is much freer than in English because the endings show how words fit together.

So angiportum obscurum simply means dark alley.
The adjective comes after the noun here, which is very normal Latin word order.

What matters most is not position, but agreement:

• angiportum = accusative singular neuter
• obscurum = accusative singular neuter

Latin normally has no articles.

So:

• puer can mean the boy or a boy
• angiportum obscurum can mean the dark alley or a dark alley
• forum can mean the forum or just forum

English requires articles much more often than Latin does, so when translating into English, you choose the or a based on context.

Currit is from the verb currere, meaning to run.

Currit is:

• present tense
• third person singular
• active
• indicative

So it means:

• he runs
• she runs
• it runs
• or in context, the boy runs / is running

Because the subject is puer, we understand it as the boy runs or the boy is running.

Yes. Latin often leaves out the subject when it is clear from the verb ending.

Since currit already means he/she/it runs, a Latin speaker could say:

Per angiportum obscurum ad forum currit.

That would mean something like He is running through a dark alley to the forum.

In your sentence, puer is included for clarity or emphasis.

Yes. Latin word order is flexible because case endings show the grammatical roles.

For example, these would still mean essentially the same thing:

• Puer per angiportum obscurum ad forum currit.
• Ad forum puer per angiportum obscurum currit.
• Per angiportum obscurum puer ad forum currit.

The basic meaning stays the same, but the emphasis can shift depending on what comes first or last.

In your sentence, the order feels straightforward:

• subject first: puer
• route next: per angiportum obscurum
• destination next: ad forum
• verb last: currit

Angiportum means a narrow lane, alley, or back street.

It is more specific than a general word like via (road or street).
So per angiportum obscurum gives a vivid image: the boy is running through a dark, narrow alley.

Forum is a neuter noun of the second declension.

Its accusative singular form is also forum, which is why after ad you see:

• ad forum

Yes, it matters, because the preposition ad requires the accusative.
With a neuter second-declension noun like forum, the accusative singular looks the same as the nominative singular.

So:

• nominative: forum
• accusative: forum

The form does not change, but the function does.

A common classroom pronunciation would be roughly:

POO-er pair ahn-ghee-POR-toom ob-SKOO-room ahd FOH-room KOOR-rit

If you want a more classical-style pronunciation:

• puer = POO-er
• per = pair
• angiportum = ahn-ghee-POR-toom
• obscurum = ob-SKOO-room
• ad forum = ahd FOH-room
• currit = KOOR-rit

A few helpful points:

• c is always hard, like k
• u is pronounced like oo
• v in classical pronunciation sounds like w, though there is no v in this sentence

Because they express different ideas, and using both makes the movement more precise.

• per tells you the space traveled through
• ad tells you the destination reached or aimed at

So the sentence does not just say the boy runs to the forum.
It says more specifically that he runs through a dark alley to the forum.

That combination is very natural in Latin.