This document introduces various sentence connectors commonly used in professional writing. It provides examples of coordinating conjunctions like "and", "but", and "or" and discusses how they join elements of equal or contrasting importance. Transitional words like "moreover", "in addition", "as well", and "too" are presented as joining ideas and adding information. The document concludes with rules for appropriate usage, advising writers not to overuse connectors or mix different types in the same sentence.