The golden brown dog was effortlessly playing with his bushy tail.
This is not a very clear question. Do you want a descriptive sentence ABOUT a dog or what? A descriptive sentence is one where you give a description about the topic. Here's what I THINK you might want: The tiny Pekenese dog pranced across the floor, barking happily.
A dog waggles its tail when its playing and exited
The dog wagged his tail.
The possessive form is the possessive adjective (a pronoun) its.The possessive adjective is describing the dog's tail as the tail belonging to it: its tail.
"The dog chased its tail."
the tail of dog is like the story of my friend
The dog wagged its tail.
The little dog was having fun chasing his own tail.
The dog wagged his tail in the middle of the road.
A dog wags its tail
No. No need for a coma with this sentence. You forgot some ' though. Should be-Mervin's dog wags it's tail when it gets a bone.
"With the crooked tail" is the prepositional phrase.