De wolken verdwijnen en de hemel wordt weer blauw.

Verdwijnen means “to disappear” or “to vanish.” It’s a regular weak verb. In the present tense you conjugate it as follows:

• ik verdwijn
• jij verdwijnt
• hij/zij/het verdwijnt
• wij/jullie/zij verdwijnen

Here the subject is de wolken (third person plural), so we use verdwijnen: De wolken verdwijnen = “The clouds are disappearing.”

• Worden = “to become.” You use it when something changes from one state to another.
• Zijn = “to be.” You use it to describe a static state or condition.

In our sentence, de hemel wordt weer blauw means “the sky is becoming blue again.” If you said de hemel is blauw, you’d simply state “the sky is blue” (no emphasis on a change).

• In Dutch, de is the definite article for all plural nouns, regardless of gender.
• For singular nouns you choose de (common gender) or het (neuter gender).

Here:

• wolken (clouds) is plural → de wolken
• hemel (sky) is singular and common gender → de hemel

Dutch main clauses follow the pattern:
Subject – Verb – (Adverb) – Object/Complement

In de hemel wordt weer blauw we have:

• Subject: de hemel
• Verb: wordt
• Adverb: weer
• Complement (adjective): blauw