With regard to,
In regard to,
(1) To join two independent clauses: I go to class; I learn grammar.
(2) To join lists in which commas are present in each item: To learn, I have traveled to Midwood, Brooklyn; Montevideo, Uruguay; and Los Angeles, California.
(3) To join complicated clauses that include commas: I love to study grammar, my favorite; to do my writing assignments; and to read Hayek's and Hazlitt's books.
C. "Would" and “could.”