Sentences are language units that consist of one or more words and express a complete thought or idea. They begin with a capital letter and end with a punctuation mark, usually a period, question mark, or exclamation point. Proper syntax ensures that sentences follow specific rules and structures for coherence and comprehension. There are different types of sentences, usually distinguished by their structure or purpose.

Declarative sentences: Make a statement or convey information. Example: She reads the book.
Interrogative sentences: Pose a question. Example: Do you like ice cream?
Imperative sentences: Give a command or request. Example: Close the door.
Exclamatory sentences: Express strong feelings or emotions. Example: I can’t believe it!