Kůrka je natolik tmavá, že bochník nenecháme v troubě.

It means so ... that or to such an extent that.

So:

• natolik tmavá = so dark
• že bochník nenecháme v troubě = that we won’t leave the loaf in the oven

This is a common Czech pattern:

• Byl natolik unavený, že usnul. = He was so tired that he fell asleep.

In everyday speech, Czech often uses tak ... že instead of natolik ... že. Natolik can sound a bit more formal or emphatic.

Because it agrees with kůrka, which is a feminine singular noun.

In Czech, adjectives must match the noun in:

• gender
• number
• case

Here:

• kůrka = feminine singular
• so the adjective is tmavá = feminine singular form of tmavý (dark)

Compare:

• tmavý bochník = a dark loaf
• tmavá kůrka = a dark crust
• tmavé pečivo = dark pastry/baked goods

There is — it is je.

The structure is:

• Kůrka = the crust
• je = is
• natolik tmavá = so dark

So literally:

• Kůrka je natolik tmavá... = The crust is so dark...

Czech often works quite similarly to English here.

Bochník is the direct object of nenecháme, so it is in the accusative case. But for many masculine inanimate nouns, the accusative singular looks exactly the same as the nominative singular.

So:

• nominative: bochník
• accusative: bochník

That is normal.

Compare with a masculine animate noun, where the accusative often changes:

• nominative: muž
• accusative: muže

But:

• nominative: bochník
• accusative: bochník

Here it means we will not leave.

A key point: nechat is a perfective verb, and in Czech, the present-tense forms of perfective verbs usually have future meaning.

So:

• necháme = we will leave / we will let
• nenecháme = we will not leave / we will not let

In this sentence, the meaning is clearly:

• we won’t leave the loaf in the oven

The verb nechat can also mean to let, but context shows that here it means to leave something somewhere.

Because Czech usually drops subject pronouns when they are not needed.

The ending -áme in nenecháme already tells you the subject is we.

So Czech normally says:

• nenecháme = we won’t leave

Adding my is possible, but it usually adds emphasis, contrast, or clarity:

• My bochník nenecháme v troubě. = We won’t leave the loaf in the oven.
  (perhaps implying someone else might)

Because v meaning in for location takes the locative case.

Here the loaf is located in the oven, so:

• v troubě = in the oven

The noun is:

• dictionary form: trouba
• locative singular: troubě

Compare:

• v troubě = in the oven
• v kuchyni = in the kitchen
• v lednici = in the fridge

If there were motion into something, Czech often uses a different preposition/case pattern, for example:

• do trouby = into the oven

Yes. In standard Czech spelling, a subordinate clause introduced by že is separated by a comma.

So:

• Kůrka je natolik tmavá, že bochník nenecháme v troubě.

That comma is required.

This is very common in Czech with conjunctions like:

• že = that
• když = when
• protože = because

Yes, absolutely.

• Kůrka je tak tmavá, že bochník nenecháme v troubě.

This means the same thing and often sounds more everyday and conversational.

Very roughly:

• tak ... že = more common, neutral, everyday
• natolik ... že = a bit more formal or stylistically stronger

Both are correct.

Not completely. Czech word order is flexible, although different orders can sound more natural in different contexts.

The given sentence is natural, but you could also hear:

• Kůrka je natolik tmavá, že nenecháme bochník v troubě.
• Kůrka je natolik tmavá, že bochník už nenecháme v troubě.

The differences are mostly about emphasis and information flow, not basic meaning.

In the original version, bochník comes early in the second clause, which keeps attention on the loaf as the object being acted on.

Because the sentence means that we decide not to leave the loaf there.

• nechat bochník v troubě = to leave the loaf in the oven

If you used a verb like zůstat (to stay/remain), the subject would be the loaf itself:

• Bochník nezůstane v troubě. = The loaf will not remain in the oven.

That is grammatically possible, but it shifts the focus. The original sentence focuses on our action/decision: we won’t leave it there.

Not only. Kůrka can mean crust, rind, or peel, depending on context.

For example:

• bread crust
• cheese rind
• tree bark in some contexts is related to similar vocabulary, though usually a different word is used

In this sentence, because of bochník and v troubě, it clearly means the crust of the loaf.

Yes, it is understandable and grammatical.

A native speaker might also say something slightly more everyday, such as:

• Kůrka je tak tmavá, že bochník už nenecháme v troubě.

Adding už can make the idea sound more natural in context: we won’t leave it in the oven any longer.

So the original sentence is fine, but in casual speech a Czech speaker might choose a slightly simpler or more idiomatic wording.