How old is your dog?

how Adverb

— The word "how" is a question word, to ask about the way something happens or the way people do things. How will we ever solve this problem? — The word "how" is used to tell about the way something happens or the way people do things. I know how we can solve this problem? This is how to make this machine work. — used to show that you feel strongly about something. How old he looks!

how Subordinator

— You use how to tell that something happens, is done, or is true. She told him how it wasn't fun anymore.

old Adjective

— If someone or something is old, they are not young; they have been in existence for a long time. An old man has gray hair. — How old someone is, is their age. "Ashley, how old are you?" "I'm only 16 years old."

is Verb

— A form of the verb be when talking about someone or something else. He is late for class. Is it hot in here?

your Pronoun

— Your things are things which belong to you. Can I eat some of your ice-cream please?

dog Noun

— A dog is a domestic mammal, related to wolves and foxes, that is often kept as a pet. My pet dog is called "Rover".

dog Verb

— If you dog someone, you follow them while being annoying. — If you dog something or someone, you follow them to try to catch them.