Determining the Placement and Functions of Commas

Punctuate the following sentences with commas. In each case, identify the relevant comma rule. If there is more than one acceptable answer, explain why that is so.
1 Having been told of the test, John wondered when he would study.
If there is a dependent clause at the beginning of a sentence, always put a comma between the dependent and independent clauses.
2 He realized, nevertheless, that Martha would not let him keep a dog.
Commas always set off a phrase that interrupts the flow of a sentence.
3 When she noticed the time, Marie realized she would be late.
If there is a dependent clause at the beginning of a sentence, always put a comma between the dependent and independent clauses.
4 As I entered the room, I realized that I was late again.
If there is a dependent clause at the beginning of a sentence, always put a comma between the dependent and independent clauses.
5 He drove through Illinois, Indiana, and Kentucky.
Use commas to separate items in a list.
6 Although it was a hot, sticky, miserable day, Mrs. Marston looked cool.
Use commas to separate adjectives that provide equally important descriptions of a noun.
7 Your handwriting is sloppy, but your punctuation is perfect.
In a compound sentence, always put a comma before the coordinating conjunction.
8 Th...