Simple:
* The sun is shining.
* I like pizza.
* She went to the store.
* The dog barked.
* He is a doctor.
Compound:
* The sun is shining, and the birds are singing.
* I like pizza, but I don't like pineapple on it.
* She went to the store, and she bought some groceries.
* The dog barked, but he didn't bite.
* He is a doctor, and he works at the hospital.
Complex:
* Because the sun was shining, we went to the park.
* Although I like pizza, I don't like pineapple on it.
* When she went to the store, she bought some groceries.
* Even though the dog barked, he didn't bite.
* Since he is a doctor, he works at the hospital.
Examples with different subjects and verbs:
* Subject: The cat, Verb: slept: The cat slept on the couch.
* Subject: My friend, Verb: is visiting: My friend is visiting from out of town.
* Subject: The car, Verb: crashed: The car crashed into a tree.
* Subject: We, Verb: are going: We are going to the beach.
Key characteristics of declarative sentences:
* They make a statement.
* They end with a period (.).
* They have a subject and a verb.
* They can be simple, compound, or complex.