Mos puellae bonus est: cotidie prima hora surgit et ad scholam venit.

Latin does not have articles. There is no separate word for the or a/an.

So Latin simply says Mos puellae bonus est, and English adds the article that sounds natural from the context: the girl's habit or a girl's habit. In this sentence, the girl's habit is the most natural English choice.

Here puellae is best understood as a genitive singular form, meaning of the girl.

So:

• mos = habit, custom
• puellae = of the girl

Together, mos puellae means the girl's habit.

A beginner should also know that puellae is a form with several possible meanings in Latin:

• genitive singular
• dative singular
• nominative plural

But in this sentence, the genitive meaning of the girl is the one that fits.

Because bonus agrees with mos, not with puellae.

The noun being described as good is mos, and mos is masculine singular. Therefore the adjective must also be masculine singular:

• mos bonus = a good habit

Even though the girl is feminine, the adjective does not match the owner; it matches the noun it describes.

Mos can mean custom, habit, way, or usual practice.

In this sentence it is being used in the sense of habit or routine. So the idea is that the girl's usual way of behaving is good.

This word is broader than a single action. It suggests a regular pattern of behavior, which is why the second part of the sentence gives an example of what she does every day.

This is a very good question.

Grammatically, puellae itself is not the subject of surgit and venit. The verbs are third person singular, and Latin often leaves the subject pronoun unstated when it can be understood from context.

So the sentence expects you to understand an implied she:

• surgit = she gets up
• venit = she comes/goes

The girl has already been introduced, so Latin does not need to repeat puella or add ea.

Cotidie is an adverb meaning daily or every day.

It tells you that the actions are habitual, not just happening once:

• cotidie surgit = she gets up every day
• cotidie ... venit = she comes/goes ... every day

This adverb helps explain why the present tense is being used for repeated action.

Because Latin often uses the ablative of time when without any preposition.

So prima hora means at the first hour.

A few useful points:

• hora is in the ablative singular
• prima agrees with hora
• no Latin word for at is needed here

Also, prima hora does not necessarily mean at one o'clock in the modern sense. In Roman timekeeping, it means the first hour of daylight, so more generally it suggests early in the morning.

Because ad + accusative is used for motion toward a place.

So:

• ad scholam = to school
• in schola = in school / at school

Since the sentence is talking about going or coming to school, Latin uses ad scholam.

Also notice the case:

• scholam is accusative singular
• that is the normal case after ad

Literally, venit means comes.

However, in English, when talking about someone's daily routine, we often say goes to school. So depending on how the sentence is being translated, you may see either:

• she comes to school
• she goes to school

Latin is using venire, focusing on arrival at the destination. English may choose comes or goes depending on what sounds natural in context.

They are in the present tense because Latin often uses the present for habitual or repeated actions.

This is not just she gets up right now. Because of cotidie, the meaning is more like:

• Every day she gets up...
• Every day she comes/goes...

So the present tense here describes a regular routine.

Yes. Latin word order is much more flexible than English word order because Latin uses endings to show grammatical relationships.

So Mos puellae bonus est could be rearranged in other ways without changing the basic meaning, for example:

• Bonus est mos puellae
• Puellae mos bonus est

The choice of order affects emphasis and style more than basic grammar.

In this sentence, the order feels natural for introducing the topic the girl's habit and then stating it is good. The colon then adds an explanation or example of that good habit.