Ta malá lampa je rozbitá a moje sestra říká, že večer potřebuje nové světlo.

Not exactly. Czech has no true articles like English the and a/an.

Here, ta is the feminine singular form of the demonstrative ten / ta / to, which literally means that. In real sentences, though, it can sometimes feel a bit article-like when you are talking about a specific, already known thing.

So ta malá lampa is literally that small lamp, but depending on context it may be translated more naturally as the small lamp.

Because they all agree with lampa.

In Czech, demonstratives and adjectives must match the noun in:

• gender
• number
• case

Lampa is:

• feminine
• singular
• nominative

So the matching forms are:

• ta = feminine singular nominative
• malá = feminine singular nominative
• rozbitá = feminine singular nominative

If the noun changed, the endings would change too:

• ten malý stůl je rozbitý
• to malé světlo je rozbité

In this sentence, it functions as an adjective meaning broken.

It comes from the verb rozbít = to break / to smash, but here it describes the state of the lamp, not an action happening right now.

So:

• lampa je rozbitá = the lamp is broken

This is a very common pattern in Czech:

• otevřený = open
• zavřený = closed
• unavený = tired
• rozbitý = broken

Because the two conjunctions behave differently.

• a = and
  It joins two main clauses, and Czech normally does not put a comma before a simple a.

• že = that
  It introduces a subordinate clause, and Czech normally does put a comma before subordinate conjunctions like že, když, protože, aby, etc.

So:

• Ta malá lampa je rozbitá a moje sestra říká, že...

is punctuated exactly as Czech grammar expects.

Both are correct.

Czech has a longer form moje and a shorter form má for the feminine singular of můj.

So both of these can mean my sister:

• moje sestra
• má sestra

In modern everyday Czech, moje is very common and sounds natural in speech.
Má is also correct, but it can sound a bit shorter, sometimes slightly more formal, literary, or stylistically marked depending on context.

For a learner, the safest takeaway is: both exist, and moje sestra is perfectly normal.

Usually no. In this kind of sentence, Czech normally keeps že.

English often allows:

• My sister says she needs...

But Czech usually needs:

• Moje sestra říká, že potřebuje...

Leaving out že here would sound unnatural or simply wrong. So this is an important difference from English.

Because večer can work adverbially by itself.

Here it means:

• in the evening
• this evening
• sometimes just tonight, depending on context

Czech often expresses times of day this way:

• ráno = in the morning
• dopoledne = in the late morning
• odpoledne = in the afternoon
• večer = in the evening

So že večer potřebuje... is completely natural. You do not say v večer here.

Because the subject is moje sestra, which is third person singular: she.

The verb is potřebovat = to need.
Its present-tense forms include:

• já potřebuji / potřebuju
• ty potřebuješ
• on / ona potřebuje
• my potřebujeme
• vy potřebujete
• oni potřebují / potřebujou

So:

• moje sestra potřebuje = my sister needs

It is in the accusative, because it is the direct object of potřebuje.

The noun světlo is:

• neuter
• singular

And for many neuter singular nouns, the nominative and accusative look the same. So:

• nominative: nové světlo
• accusative: nové světlo

The adjective nové agrees with světlo in gender, number, and case.

A useful comparison:

• potřebuje nové světlo
• but: potřebuje novou lampu

Here lampu is feminine accusative, so the form changes more visibly.

Because světlo is broader than lampa.

• lampa = a lamp
• světlo = light, lighting, or a light source / light fixture

So after saying that the lamp is broken, Czech can naturally switch to nové světlo to mean something like a new light or a new lamp/light source, depending on context.

English often prefers to repeat the same noun more directly, but Czech is comfortable with this broader wording.

Yes. Czech word order is fairly flexible because endings carry a lot of the grammar.

The sentence says:

• že večer potřebuje nové světlo

But you could also hear:

• že potřebuje večer nové světlo

The basic meaning stays the same, but the focus shifts slightly.

In the original version, večer comes early, so the time frame is introduced sooner. That feels natural if this evening / in the evening is an important part of the message.

So the given word order is normal, but it is not the only possible one.

Two tricky points here are ř and svě.

• říká
  The ř is the famous Czech sound with no exact English equivalent. It is something like an r and a zh sound produced together. It usually takes practice and is best learned from audio rather than description alone.

• světlo
  The svě is roughly like svye, with a softening effect before ě.

Also remember that Czech stress normally falls on the first syllable of each word:

• ŘÍ-ká
• SVĚ-tlo
• LAM-pa
• VE-čer

So even if vowel length changes meaning, stress usually stays at the beginning.