Guide to Grammar and Usage 299 Example:Sit down and write! Sentence Variety Unless you are writing certain kinds of dialogue, all your sentences should be grammatically correct. In addition, craft your sentences to express your ideas in the best possible way. Strive for rhythm, pattern, and variety as well. Here are some ideas to try: · Expand short sentences by adding detail. Short:The plane took off. Expanded--: The plane took off, a shrieking golden ribbon in the morning sky. · Combine short sentences. Short:O. Henry wrote a short story called "The Gift of the Magi." A husband sells his watch to buy his wife combs. They are for her beautiful hair. Combined--: In O. Henry's short story "The Gift of the Magi," a husband sells his watch to buy his wife combs for her beautiful hair. · Change sentence openings. Sentence:I unlocked the attic door with great difficulty. Revised--: With great difficulty, I unlocked the attic door. Sentences A sentence is a group of words that express a complete thought. A sentence has two parts: a subject and a predicate. The subject includes the noun or pronoun that tells what the subject is about. The predicate includes the verb that describes what the subject is doing.