Postea avus solstitium praedicit, polum ostendit, et sphaeram circumagit.

The sentence has:

• an adverb: Postea = afterward / later
• a subject: avus = the grandfather
• three verbs: praedicit, ostendit, circumagit
• three direct objects: solstitium, polum, sphaeram

So the core pattern is:

Postea + avus + verb 1 + object 1, verb 2 + object 2, et verb 3 + object 3

Latin often strings together several verbs with the same subject like this.

Because Latin word order is flexible, and an adverb like postea is often placed early to set the scene:

• Postea = afterward / then / later

Putting it first tells you the time frame right away. English often does the same:

• Later, the grandfather predicts...
• Afterward, the grandfather predicts...

So this is a very natural Latin placement.

Avus is nominative singular.

That tells you it is the subject of the sentence: the person doing the actions.

The three verbs are all third person singular, so they match avus:

• avus praedicit
• avus ostendit
• avus circumagit

So avus is the one who predicts, shows, and rotates/moves around.

Because Latin has no definite article and no indefinite article.

So:

• avus can mean grandfather, a grandfather, or the grandfather

You figure out which is best from context.

This is very common for English speakers to notice, since English requires articles so often, but Latin simply does not use them.

All three are present active indicative, third person singular.

Breaking them down:

• praedicit = he predicts
• ostendit = he shows
• circumagit = he moves around / rotates / turns around

The ending -t is the key sign here: it marks he/she/it in the present tense.

Yes. All three are direct objects of the three verbs.

• praedicit solstitium
• ostendit polum
• circumagit sphaeram

They are in the accusative singular, which is the normal case for a direct object in Latin.

You can spot that here from the endings:

• solstitium = accusative singular
• polum = accusative singular
• sphaeram = accusative singular

So the pattern is very neat: each verb has its own object.

Because they belong to different declensions.

• solstitium is a 2nd-declension neuter noun
• polus is a 2nd-declension masculine noun, so its accusative singular is polum
• sphaera is a 1st-declension feminine noun, so its accusative singular is sphaeram

So the different endings reflect different noun classes, not different functions. All three are still direct objects.

This is just a standard way of making a list in Latin, just like in English.

Latin often does:

• item 1,
• item 2,
• et item 3

So here:

• praedicit
• ostendit
• et circumagit

That is exactly like English:

• predicts, shows, and rotates

Latin could repeat et more often, but it does not have to.

Yes. Praedicit is a compound of:

• prae- = before
• dicit from dicere = to say

So praedicere literally means something like to say beforehand, which is why it means to predict or foretell.

This is a useful pattern in Latin: many verbs are built by adding prefixes to a simpler verb.

Yes.

It comes from:

• circum = around
• agit from agere = to drive, do, move

So circumagit literally means drives around or moves around, and in context it can mean rotates, turns around, or spins.

Again, this is a very common Latin feature: a preposition or adverb becomes a prefix attached to a verb.

Because one subject can easily govern several verbs.

So Latin understands:

• avus praedicit
• [avus] ostendit
• [avus] circumagit

Once the subject is stated, it does not need to be repeated unless the writer wants extra emphasis or clarity.

English works similarly:

• The grandfather predicts, shows, and rotates...

We do not usually repeat the grandfather three times either.

Yes, it could have.

Since the verb endings already show third person singular, Latin can often omit the subject pronoun or even the subject noun if it is clear from context.

For example, a Latin sentence could simply say:

• Postea solstitium praedicit, polum ostendit, et sphaeram circumagit.

That would mean:

• Afterward, he predicts the solstice, shows the pole, and rotates the sphere.

But including avus makes the subject explicit and clear.

Because Latin relies much more on endings than on word order.

In English, word order tells you who is doing what:

• The grandfather shows the pole

If you change the order too much, the meaning becomes unclear.

In Latin, the endings do much of that work:

• avus = nominative subject
• polum = accusative object

So Latin can arrange words more freely for emphasis, rhythm, or style.

This sentence is actually fairly straightforward, but it is still not locked into strict English-style order.

Yes.

All three verbs are:

• present tense
• third person singular
• referring to the same subject, avus

So the sentence presents three actions performed by one person in the same general time frame:

• he predicts
• he shows
• he rotates

This kind of parallel structure is very common and very useful to notice when reading Latin.

Yes, at least sphaera is clearly a Greek loanword, and polus is also Greek in origin.

That matters mainly because English speakers may recognize them:

• sphaera is related to English sphere
• polus/polum is related to English pole

Even when a Latin word comes from Greek, it usually gets fitted into a Latin declension pattern, which is why you see forms like polum and sphaeram.

A good reading strategy would be:

1. Find the scene-setting word:

   • Postea

2. Find the subject:

   • avus

3. Identify the verbs:

   • praedicit
   • ostendit
   • circumagit

4. Match each verb with its object:

   • praedicit → solstitium
   • ostendit → polum
   • circumagit → sphaeram

That gives you the grammatical skeleton quickly, even before thinking about style or nuance.