The studies of Hunt, O'Donnell, and Loban all suggest that the subordinate clause is usually mastered by most students between seventh and nineth grades. But not all subordination is the same, and some students develop early, others late. These examples explore problems students encounter as they master subordinate clauses.

Although the author Kent Scheidegger of the essay "Habeas Corpus is Abused by Concivts" relays many good examples of the abuse of this procedure, but the fallacies in which the author commits weakens his essay and argument dramatically. [See also "in which.]

[In this case, the writer has subordinated the first clause with "although," but has retained the "but" that would join two main clauses.]