Just some examples, not exhaustive. Whatever you can do in Bootstrap you should be able to do here too.
Full width column
[row] [col class='col-md-12']Full width column[/col] [/row]
Column 1/3
Column 2/3
Column 3/3
[row] [col class='col-sm' style="background-color:purple"]Column 1/3[/col] [col class='col-sm']Column 2/3[/col] [col class='col-sm']Column 3/3[/col] [/row]
Column 1/4
Column 2/4
Column 3/4
Column 4/4
Column 1/2 – wide
Column 2/2 – narrow