Question

whats the independent clause of Since the weather was so warm this weekend, my son and his friends went boating

Answer 1

An independent clause is a clause which can stand alone as a sentence.

In this sentence, there are two parts :

"the weather was so warm this weekend"    and

"my son and his friends went boating"

The independent clause is the second one ; "my son and his friends went boating" because it can act as a complete sentence. It has a verb and a noun.