Quick Recap from yesterday:
Main Clause = clause that MAKES SENSE on its own.
Subordinate Clause = clause that RELIES on a main clause to make sense.
A comma links a main and subordinate clause.
A dash links extra information (usually a subordinate clause). Can be used in embedded clauses instead of brackets () or commas.
A full stop separates two or more main clauses.
A semi colon also separates two or more main clauses.