We have a dog.

we Pronoun

— The person speaking and other people with him or her. "Are you and Mia still going?" "No, were finished." We went to Paris together. We ought to help. Let's go. We need to talk to Mark. We won our football game. — People in general. We need to think about other people more.

we Determiner

— The person speaking and other people with him or her. We Canadians don't act that way.

have Verb

— Someone has something if the thing is in their hands. The person is holding or gripping it. Do you have a spoon, or do you need me to give you one so you can eat the soup? — If you have uto/u do something, you must do it. I have to go. I had to do it. — Someone has something if the thing is that person's thing: the person owns it; it belongs to the person. The rich family has a big house. — If you have you hold something in the mind. I have a doubt about him. — If you have you join something. We have lunch at 13:00. — You use have to say that you suffer from something or to tell the experience. I have a defective vision. (I don't see well.) He had a wonderful time with his friends.

a Determinative

— A is used when the following word could be any of a certain type. Compare "A book I saw on the shelf" and "The book I gave you yesterday".

a Noun

— A is the first letter of the alphabet. The letter "a" comes before "b". — In some schools, an A is a very high grade. Ron got an A on his earth science test.

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.