Apedia

Comma Told I Avoid Conjunction Correct Usage Trouble. 

Front
is this correct comma usage?

He told me that I had better come, so that they would avoid serious trouble. 
Back no. Commas do not set off subordinate clauses unless some other comma rule applies 

so that is a subordinating conjunction (don't be tricked by the presence of "so".. it's not used as a coordinating conjunction here)

He told me that I had better come so that they would avoid serious trouble.

Tags: grammar

Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.

Next card: Noun appositive phrase clause pronoun renames describes pronoun. 

Previous card: Purpose  when coordinating conjunction preposition introduce reason previous

Up to card list: English Grammar and Style [@jackkinsella]