This chapter discusses the light of the account that has been given of the various types of cohesion in English. Cohesion expresses the continuity that exists between one part of the text and another. Typically, in any text, every sentence except the first exhibits some form of cohesion with a preceding sentence, usually with the one immediately preceding. Many familiar texts in fact come out as less than one sentence in the grammatical structure. Conjunction is on the borderline of the grammatical and the lexical, the set of conjunctive elements can probably be interpreted grammatically in terms of systems, but such an interpretation would be fairly complex. The semantic level in the linguistic system is, among other things, an interface between language and the realities of the outside world. The substitution relation has no connection with specifying or identifying a particular referent; it is quite neutral in this regard.