The dog is running fast.

Meaning: This means that the dog is moving quickly on foot at a high speed.

Choice of Words: The dog is a noun phrase that refers to a specific canine animal. Is is a verb that means to exist or to be. Running is a verb that means to move quickly on foot. Fast is an adverb that means to move at a high speed.

Alternative Expressions

Related Expressions

• Dog's owner called, dog came running back.
• Running fast helps strengthen your heart and lungs.
• The dog is running.
• The dog is running in the yard.
• The dog is running in the park.
• The dog was happily running through the forest.
• Dog slowly stopped running and panting.
• The dog came running back.
• The dog is running in the park
• The owner called her dog's name, and it came running.