Dog wags its tail.

Meaning: The dog moves its tail back and forth.

Choice of Words: Dog is the animal we are talking about. Wags means that the dog is moving its tail back and forth. Its indicates that the tail belongs to the dog. Tail is the long, thin part of the dog's body that extends from its back.

Alternative Expressions

The dog is wagging its tail.

Meaning: This means that the dog is currently moving its tail back and forth quickly. Dogs often do this when they are happy or excited.

Choice of Words: The dog is a specific animal that we are talking about. Is is a verb that means that something is happening right now. Wagging is a verb that means to move back and forth quickly. Tail is the long, thin part of a dog's body that sticks out behind it.

Related Expressions