The document discusses the different types of cohesion identified by Halliday and Hasan (1976), including lexical cohesion, reference, substitution, ellipsis, and conjunction. It provides examples to illustrate various sub-types of cohesion such as personal reference, demonstrative reference, comparative reference, nominal substitution, verbal substitution, clausal substitution, nominal ellipsis, verbal ellipsis, clausal ellipsis, additive conjunction, adversative conjunction, and causal conjunction.