which structure should the sentences in a piece of formal writing have?

Sentences in a piece of formal writing should generally have the following structure:

1. Clear and concise topic sentence: Start each paragraph with a clear and specific topic sentence that introduces the main idea or argument of the paragraph.

2. Supporting sentences: Follow the topic sentence with several sentences that provide evidence, examples, explanations, or analysis to support the main idea. These sentences should expand on the topic sentence and provide relevant information to make your point.

3. Transition words or phrases: Use transitional words or phrases to smoothly connect your sentences and ideas. Examples of transition words include "however," "moreover," "in addition," "on the other hand," "furthermore," or "consequently." These transitions help to create coherence and logical flow throughout your writing.

4. Concluding sentence: End each paragraph with a concluding sentence that summarizes the main point made in the paragraph and connects it back to the thesis or overall argument of the piece.

5. Varied sentence structure: Incorporate a mix of sentence structures, including simple, compound, and complex sentences, to add variety and make your writing more engaging. This diversity helps maintain the reader's interest and adds sophistication to your style.

6. Proper grammar and punctuation: Ensure your sentences follow the basic rules of grammar and punctuation. Use correct capitalization, subject-verb agreement, consistent tense, appropriate use of commas, periods, semicolons, and other punctuation marks.

Remember that the structure may vary depending on the specific requirements and guidelines of the formal writing task, such as academic essays, research papers, or professional reports. Always follow the provided instructions or consult specific style guides if applicable.