1. As a conjunctive adverb:
* When starting a sentence: "However, the plan was ultimately rejected." (comma after "however")
* When used within a sentence: "The team was tired, however, they pressed on." (comma before and after "however")
2. As a coordinating conjunction (less common):
* "I want to go, however, I don't have the time." (comma before and after "however")
Key Points:
* Commas are essential: You should always use commas before and after "however" when it acts as a conjunctive adverb.
* Semicolons are an option: You can use a semicolon before "however" if the two clauses are closely related and could stand alone as sentences. For example: "The weather was awful; however, the show went on."
* Avoid incorrect punctuation: Do not use a period or colon before "however."
Examples:
* Conjunctive adverb: "The movie was long, however, it was entertaining."
* Conjunctive adverb: "However, the dog did not like the new food."
* Coordinating conjunction: "I tried to call, however, I couldn't get through."
* Semicolon: "The party was a disaster; however, I had a good time."
Remember, the specific punctuation depends on the sentence structure and the intended meaning. If you're unsure, it's always best to err on the side of using commas.