How is this sentence punctuated correctly Mr Thomas however watched for other things Joe whispered to Fred?

Here are a couple of ways to punctuate the sentence correctly, depending on the intended meaning:

Option 1: "However" as an Adverb

* Mr. Thomas, however, watched for other things. Joe whispered to Fred.

* This separates the two independent clauses and emphasizes the contrast between Mr. Thomas's actions and Joe's.

Option 2: "However" Introducing a Dependent Clause

* Mr. Thomas watched for other things, however, Joe whispered to Fred.

* This emphasizes the contrast within the same sentence, making it clear that Joe's whispering is happening despite Mr. Thomas's attention.

Key Points:

* Commas are used to separate independent clauses when connected by a coordinating conjunction (for, and, nor, but, or, yet, so).

* Commas are also used to set off introductory words or phrases like "however."

* Periods are used to separate complete sentences.

Let me know if you'd like to explore any other variations!