Question

Can I have an example of a sentence using conjunctive adverbs (comma rule) and another sentence with an example of commas with descriptive adjectives.

Answer 1

Conjunctive adverbs connect one clause to another clause, or one idea to another idea:
Joanne was very good at math; however, she is not good at English.

Descriptive adjectives can be separated with commas in a sentence such as:
Joanne did not want to pet the smelly, wet dog.