Avus puero dicit: “Si chartam et stilum habes, epistulam hodie scribe et cras ad me redi.”

Because puero is the indirect object of dicit. The grandfather is speaking to the boy, so Latin uses the dative for the person told or spoken to.

• avus = the subject, grandfather
• dicit = says / tells
• puero = to the boy

So Avus puero dicit literally means The grandfather says to the boy.

Latin word order is much freer than English word order because the endings show each word’s job in the sentence. So avus puero dicit and avus dicit puero would mean basically the same thing.

The order here may simply sound natural, or it may put a little emphasis on puero before the speech begins. In Latin, word order often helps with style and emphasis rather than basic grammar.

Latin has no articles. It does not have separate words for the, a, or an.

So:

• avus can mean grandfather, a grandfather, or the grandfather
• puero can mean to a boy or to the boy
• chartam can mean a sheet of paper or the paper

You decide from the context which English article makes best sense.

Because they are the direct objects of habes.

In Si chartam et stilum habes:

• habes = you have
• chartam = paper / a sheet of paper
• stilum = stylus / pen-like writing tool

The things being had are the direct objects, so Latin puts them in the accusative.

Because the sentence is talking about one sheet of paper and one stylus as the basic things needed for writing. Latin often uses the singular where English might also use the singular: if you have paper and a pen or if you have a sheet of paper and a stylus.

Also, charta can sometimes mean a sheet of paper rather than paper in a general mass sense.

Because this is a simple, real condition: If you have paper and a stylus, write a letter today...

Latin often uses:

• si
  • present indicative for a straightforward condition
• then an imperative for the command that follows

So si ... habes ... scribe ... redi means something like: If you have these things, then do this.

There is nothing especially hypothetical or unreal about it.

Because Latin verb endings usually show the subject clearly.

• habes = you have
• scribe = write! to one person
• redi = come back / return! to one person

Since the endings already show you, Latin does not need to add tu unless it wants extra emphasis.

Scribe is the singular imperative of scribere, meaning write! It is a command addressed to one person.

So epistulam hodie scribe means Write a letter today.

If the speaker were addressing more than one person, the imperative would be different.

Because it is the direct object of scribe.

• scribe = write!
• epistulam = a letter

The thing being written is the direct object, so it is in the accusative.

Because the speaker is giving two separate commands:

1. epistulam hodie scribe = write a letter today
2. cras ad me redi = come back to me tomorrow

Latin can simply join commands with et just as English does with and.

Redi is the singular imperative of redire, meaning to go back or to return.

This verb is built from:

• re- = back
• ire = to go

So redi literally means go back!, which is naturally translated as return! or come back!

Because ad + accusative is the normal way to express movement toward a person or place.

• ad me = to me / to my place / back to where I am

The dative mihi usually means for me or to me in a non-motion sense, but after a verb of movement like redi, Latin normally prefers ad me to show direction.

It is the accusative case, because the preposition ad takes the accusative.

So:

• ad me = to me
• ad te = to you
• ad eum = to him

This is a very common pattern in Latin.

Latin adverbs are fairly flexible in position. Here they are placed next to the commands they modify:

• epistulam hodie scribe = write the letter today
• cras ad me redi = tomorrow return to me

Their position helps make the time reference clear for each command.

It can be understood either way in context.

• says is the more literal meaning of dicit
• in English, when followed by a person spoken to and then direct speech, we might naturally say the grandfather says to the boy
• sometimes English would prefer tells the boy

So grammatically it is says, but idiomatically English may choose tells depending on style.

Yes. The colon introduces the exact words spoken: Si chartam et stilum habes, epistulam hodie scribe et cras ad me redi.

In Latin texts, direct speech may be marked by punctuation in modern editions. The important clue is that the verbs inside the speech are addressed directly to you:

• habes
• scribe
• redi

That shows we are hearing the grandfather’s actual words.

It is a simple, real condition. The sense is:

If you have paper and a stylus, then write a letter today and come back to me tomorrow.

This is not a contrary-to-fact condition and not especially remote or doubtful. It is just a practical condition based on a real possibility.

Strictly speaking, stilus is a stylus, a pointed writing instrument used in the ancient world, especially for writing on wax tablets. In beginner translations, it is sometimes loosely rendered as pen so the meaning is easy to grasp.

So:

• historically: stylus
• loosely in natural English: pen or writing tool

Latin often does not need a word meaning then. The structure itself makes the relationship clear:

• Si ... habes = If you have...
• scribe et redi = the result or command that follows

English can also omit then: If you have paper and a pen, write a letter today and come back tomorrow.

So Latin is being perfectly natural here.