Question

Insert commas where they belong. Provide a short reason.

2. Ever since you asked my opinion about the soccer field battle I've been mulling the situation over trying to determine a logical consequence.

A: Ever since you asked my opinion about the soccer field battle, I've been mulling the situation over trying to determine a logical consequence.
(Should there also be comma between over,trying? But not sure of reason)
R: Comma in complex sentence when dependent clause 1st

5. Your suggestion is excellent and I may regret not trying it but I'm going to try something else first.

A: Your suggestion is excellent and I may regret not trying it, but I'm going to try something else first.
(Should there also be a comma between excellent,and? But that would be a lot of commas?)
R: comma with compound sentence

6. May you live as long as you want, and never want as long as you live!

A: correct the way it is
R: comma with compound sentence (implied "You" never want...?

7. On the occasion of your 16th birthday, we send you our best wishes.

A: correct the way it is
R: comma after introductory phrase

8. As you rightly pointed out a mistake has been made on your report card.

A: As you rightly pointed out, a mistake has been made on your report card.
R: Comma in complex sentence when dependent clause 1st

9. I don't like it when you're upset with me particularly since it was my fault.

A: I don't like it when you're upset with me, particularly since it was my fault.
R: Not sure why. Seemed like there's a pause there. Maybe no comma is needed because it's a complex sentence with independent clause 1st?

12. If I can repay the kindness let me know.
A: If I can repay the kindness, let me know.
R: Comma in complex sentence when dependent clause 1st

13. Despite our last three reminders you have still been coming to school late.

A: Despite our last three reminders, you have still been coming to school late.
R: comma after introductory phrase

17. As you are no doubt aware we are sold out.

A: As you are no doubt aware, we are sold out
R: Comma in complex sentence when dependent clause 1st

20. Writing math tests are not difficult if you study for them.

A: Correct.
R: No comma in complex sentence when independent clause 1st

Answer 1

You are <b>correct</b> on all of them. Here are my comments for a few:

2. (no comma needed after "over")
5. + the comma after "excellent" -- this sentence has 3 independent clauses; therefore ... the 2 commas.
9. for clarity; otherwise, the word "particularly" could be modifying "me"

Answer 2

thank You