Het zadel van Sofies fiets is nog nat van de regen.

Because zadel is a het-word in Dutch. Singular nouns are either de words or het words, and zadel belongs to the het group:

• het zadel = the saddle
• de zadels = the saddles

So this is something you simply need to learn with the noun.

This is a possessive form, like Sofie’s bike in English. Dutch can show possession by adding -s to a name:

• Sofies fiets = Sofie’s bike
• Peters jas = Peter’s coat

A useful thing to remember is that Dutch does not use the apostrophe in the same way English does. The important point for a learner is that possession here is being marked directly on Sofie.

Because a possessive already determines the noun.

So Dutch says:

• Sofies fiets
  not
• de Sofies fiets

This works like English:

• Sofie’s bike
  not
• the Sofie’s bike

In the full sentence, het zadel is the main noun phrase, so zadel keeps its article. Inside that phrase, Sofies fiets is just telling you which saddle.

Here van means of:

• het zadel van Sofies fiets = the saddle of Sofie’s bike

Dutch often uses van to connect two nouns when one belongs to the other. So the structure is:

• het zadel = the saddle
• van Sofies fiets = of Sofie’s bike

Because nat comes after the verb is and is being used as a predicate adjective. In Dutch, predicate adjectives normally do not take -e.

Compare:

• het zadel is nat = the saddle is wet
• het natte zadel = the wet saddle

So:

• before the noun: often -e
• after zijn, worden, blijven, etc.: usually no -e

Nog here means still.

• is nat = is wet
• is nog nat = is still wet

It suggests that the saddle has not dried yet. This is a very common use of nog in Dutch.

Because this second van has a different job. It means something like from here:

• nat van de regen = wet from the rain

So the sentence has two different uses of van:

• van Sofies fiets = of Sofie’s bike
• van de regen = from the rain

That is completely normal in Dutch.

Because Dutch often uses the article where English would not. In this expression, de regen sounds natural and idiomatic.

So Dutch says:

• nat van de regen

even though English would normally say:

• wet from rain or wet from the rain

This is one of those places where article usage does not match English exactly.

Because is is the finite verb, and in a normal main clause Dutch keeps that verb in the second position. After that, you often get adverbs like nog, then the adjective:

• Het zadel
  • is
    • nog
      • nat

This is a very standard Dutch pattern:

• De straat is nog glad.
• Mijn jas is nog vies.

Yes. Dutch often likes compounds, so you could also hear:

• Sofies fietszadel is nog nat van de regen.
• Het fietszadel van Sofie is nog nat van de regen.
• Het zadel van de fiets van Sofie is nog nat van de regen.

These all mean basically the same thing. The original sentence is perfectly natural, but Dutch gives you several ways to package the information.

A rough pronunciation guide:

• het → hut or a very weak ut
• zadel → ZAH-dul
• Sofies → so-FEES
• fiets → sounds close to feets, but with a shorter vowel
• nog → nokh with a Dutch g/ch sound
• nat → naht
• regen → RAY-ghun with the Dutch g

One important point: the g in standard Netherlands Dutch is much throatier than anything in English. In Belgian Dutch, it is often softer.