Eight formulas are created for stitching technique by using prepositions to “stitch” words together and to make it grammatically correct in Spanish. Infinitives are extensively used in the formulas as objects of preposition. It is not unusual to see different prepositions used with certain conjugated verbs. Looking for one absolute choice is not pragmatic under the circumstances. However we should still be careful in the selection of the correct choice so that we will not speak Chinese Spanish or English Spanish.