Demà la professora explicarà una lliçó nova sobre un tema important.

Demà means tomorrow. In Catalan, just like in English, a time expression can be placed at the beginning of the sentence to set the scene.

So:

• Demà la professora explicarà... = Tomorrow the teacher will explain...

This word order is very natural. Catalan does not require the kind of subject-auxiliary inversion that English sometimes uses in questions, so the rest of the sentence stays in normal order.

You could also hear:

• La professora explicarà una lliçó nova demà

but starting with Demà gives a slightly stronger focus to the time.

Catalan often uses the definite article with professions or roles when referring to a specific person.

• la professora = the teacher

Here it refers to a particular teacher, so la is needed.

Catalan uses articles more often than English in some contexts. In English, you might sometimes say Teacher will explain... only in special contexts, but in Catalan you normally say la professora if you mean a specific teacher.

Also note:

• professor = male teacher
• professora = female teacher

So la professora clearly tells you the teacher is female.

Explicarà is the future tense of explicar (to explain).

The infinitive is:

• explicar = to explain

The future for ell/ella/vostè is formed by adding -à to the infinitive:

• explicar + à = explicarà

So:

• la professora explicarà = the teacher will explain

A few future forms of explicar are:

• jo explicaré = I will explain
• tu explicaràs = you will explain
• ell/ella explicarà = he/she will explain
• nosaltres explicarem = we will explain
• vosaltres explicareu = you all will explain
• ells/elles explicaran = they will explain

The accent in explicarà shows where the stress falls:

• ex-pli-ca-rà

Without the accent, the stress pattern would be different or unclear. In Catalan, written accents are very important because they help show pronunciation and sometimes distinguish forms.

In this sentence, there are several accented words:

• Demà
• explicarà
• lliçó

These accents help you pronounce the words correctly.

This is a noun phrase:

• una = a
• lliçó = lesson
• nova = new

So:

• una lliçó nova = a new lesson

Catalan usually places descriptive adjectives after the noun, unlike English.

Compare:

• English: a new lesson
• Catalan: una lliçó nova

Also notice agreement:

• lliçó is feminine singular
• so the article is una
• and the adjective is nova (feminine singular form of nou/nova)

Because adjectives in Catalan must agree with the noun in gender and number.

Here:

• lliçó is feminine singular
• so the adjective must also be feminine singular

That gives:

• nou = new, masculine singular
• nova = new, feminine singular
• nous = new, masculine plural
• noves = new, feminine plural

So:

• un llibre nou = a new book
• una lliçó nova = a new lesson

Because tema is a masculine noun in Catalan:

• un tema = a topic

This is something English speakers have to get used to: grammatical gender does not always match the ending you might expect from other Romance languages. Even though tema ends in -a, it is masculine.

So:

• un tema important = an important topic

Other examples:

• un problema
• un sistema
• un programa

These are also masculine in Catalan.

Some Catalan adjectives have the same form for masculine and feminine singular.

So:

• un tema important
• una lliçó important

In both cases, important stays the same in the singular.

Only the plural changes:

• temes importants
• lliçons importants

So unlike nou/nova, the adjective important does not change for masculine vs. feminine in the singular.

Sobre here means about or on.

So:

• una lliçó nova sobre un tema important = a new lesson about an important topic

It introduces the subject matter of the lesson.

English speakers should be careful not to think only of the physical meaning on top of. In Catalan, sobre can also mean:

• about
• concerning
• on the topic of

Yes, very much so. The basic structure is:

• Demà = time expression
• la professora = subject
• explicarà = verb
• una lliçó nova = direct object
• sobre un tema important = prepositional phrase

So the core order is basically:

time + subject + verb + object + extra information

That is very close to English:

• Tomorrow the teacher will explain a new lesson about an important topic.

This makes the sentence fairly easy for an English speaker to follow.

Lliçó can be tricky for English speakers.

A rough guide is:

• lli-çó

Points to notice:

• ll in modern Central Catalan is often pronounced somewhat like the y sound in yes
• ç represents an s sound
• the accent in -ó shows that the stress is on the last syllable

So a rough approximation is something like lyi-SO or yi-SO, depending on accent and dialect.

Also, lliçó is feminine:

• la lliçó
• una lliçó

The key point is the final stress:

• Demà → de-MÀ
• explicarà → ex-pli-ca-RÀ

The written accent tells you that the final syllable is stressed.

That matters because Catalan stress is not always where an English speaker might guess. If you ignore the accent, your pronunciation may sound wrong or unnatural.

Yes, depending on context. In Catalan, professor/professora can refer to a teacher in general, and in some contexts also to a professor.

Often the exact English translation depends on the situation:

• school context: teacher
• university context: professor or lecturer, depending on usage

In this sentence, the meaning is already given, so the learner should mainly notice the grammar:

• professora is feminine
• it takes the article la
• it is the subject of explicarà

Yes. Catalan allows some flexibility in word order, especially for emphasis or style.

For example:

• La professora explicarà demà una lliçó nova sobre un tema important.
• Una lliçó nova sobre un tema important l’explicarà demà la professora.

The original sentence is the most neutral and easy to understand:

• Demà la professora explicarà una lliçó nova sobre un tema important.

So while Catalan allows variation, learners should first get comfortable with this standard order.