Demà la classe començarà a les vuit.

Yes. Catalan can put a time expression like demà (tomorrow) at the beginning of the sentence, just like English can.

So:

• Demà la classe començarà a les vuit.
• La classe començarà demà a les vuit.

Both are grammatical. Starting with demà gives a slight emphasis to when it happens.

Demà means tomorrow.

The accent mark on à shows the stressed syllable: de-MÀ. In Catalan, written accents often help show pronunciation and stress, and sometimes distinguish words.

Catalan often uses the definite article more naturally than English does.

So where English says:

• Class will start at eight

Catalan commonly says:

• La classe començarà a les vuit

Here la classe means the class. Even when English might omit the, Catalan frequently keeps it.

Yes, classe is feminine singular, which is why it takes la:

• la classe = the class

You often learn the gender together with the noun, since it is not always predictable from meaning alone. In this sentence, the article tells you clearly that classe is feminine.

Començarà is the future tense, third person singular, from the verb començar (to begin / to start).

So it means:

• he/she/it will begin
• here: the class will begin

Because the subject is la classe (singular), the verb is also singular.

The ç is called c trencada in Catalan. It is pronounced like an s sound.

So començarà is pronounced roughly like ko-men-sa-RA.

Catalan uses ç to keep the soft s sound before certain vowels. Without getting too technical, it is a normal spelling pattern you will see in many words, such as:

• començar
• braç
• lliçó

When telling the time something happens, Catalan uses a before the hour, like at in English:

• a les vuit = at eight

So:

• començarà a les vuit = will start at eight

Catalan uses the feminine article with clock times:

• a la una = at one
• a les dues = at two
• a les vuit = at eight

So one o’clock is singular (la una), but all the other hours use plural (les dues, les tres, les vuit, etc.).

Catalan usually does not need a separate word for o’clock in this kind of sentence.

So:

• a les vuit naturally means at eight (o’clock)

If needed, you can add more detail:

• a les vuit del matí = at eight in the morning
• a les vuit del vespre = at eight in the evening

But on its own, a les vuit is completely normal.

Yes, very often.

Catalan, like English, can use the present tense for scheduled future events. So both of these are possible:

• Demà la classe començarà a les vuit.
• Demà la classe comença a les vuit.

The version with començarà sounds explicitly future: will start.
The version with comença can sound a bit like a scheduled fact: starts.

No. In this sentence, the normal verb is començar:

• La classe començarà = The class will begin

You may also encounter començar-se, but that is a different structure and is not what is being used here. For a beginner, the key thing to remember is that with a subject like la classe, plain començar is the standard choice.

Yes, Catalan word order is fairly flexible, although some orders sound more neutral than others.

These are all possible:

• Demà la classe començarà a les vuit.
• La classe començarà demà a les vuit.
• A les vuit demà començarà la classe. (less neutral, more marked)

The most natural everyday versions are usually the first two.