The Iroquois were primarily planters, but supplementing their cultivation of maize, squash, and beans with fishing and hunting. (A) but supplementing (B) and had supplemented (C) and even though they supplemented (D) although they supplemented (E) but with supplementing Grammatical construction; Verb form Th e participle supplementing would normally be expected to modify the first clause, describing or extending its meaning, but the logic of this sentence demands a contrast, not an extension. Consequently, the second part of the sentence must be revised to emphasize the contrast properly. Th e logic of the sentence also argues against a construction that would set the two clauses and the importance of their content equal when they clearly should not be. Th e best solution is to have the main clause describe the primary activity, and a subordinate clause, although they supplemented, describe the supplementary activity.