1. After an introductory phrase: This is the most common use of the introductory comma. It separates a phrase that comes before the main clause of the sentence.
* Example: *After a long day of work*, I was ready to relax.
2. After an introductory clause: Similar to phrases, introductory clauses also need commas. They are a group of words that contain a subject and verb but do not express a complete thought.
* Example: *Because I was feeling generous*, I offered to share my dessert.
3. After an introductory word or words: Single words like "however," "therefore," or "yes" can also introduce a sentence and require a comma.
* Example: *However*, I didn't have enough to share after all.
Remember that these are just a few examples, and there are other specific situations where commas are used in introductions. The key is to ensure your reader can easily understand the sentence structure and meaning!