The giraffe's mouth is closed.
De mond van de giraf is gesloten.
The giraffe did not move its mouth.
De giraffe bewoog zijn mond niet.
If the giraffe's mouth is closed, he could still be moving (like chewing). The mouth being closed does not mean that he did not move his mouth
Als de mond van de giraffe dicht is, kan hij nog bewegen (zoals kauwen).