Question

is this correct comma usage?He told me that I had better come, so that they would avoid serious trouble.

Accepted Answer

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.

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.

Comma Told I Avoid Conjunction Correct Usage Trouble.