The following chapter provides linguistic background for the research of question tags. It
delimits the concept of question tags and characterises them with regard to their form,
meaning and usage. Individual types of question tags are specified and described. In the end,
relation of the English question tags to elements of other languages are studied. The
information contained in this chapter should serve to formulate the search pattern for
extraction of question tags from the corpus and help to interpret the basis of their translation.