Many languages have sets of demonstrative adverbs that are closely related to the demonstrative pronouns in a language. For example, corresponding to the demonstrative pronoun that are the adverbs such as then (= "at that time"), there (= "at that place"), thither (= "to that place"), thence (= "from that place"); equivalent adverbs corresponding to the demonstrative pronoun this are now, here, hither, hence. A similar relationship exists between the interrogative pronoun what and the interrogative adverbs when, where, whither, whence. See pro-form for a full table.
Read more about this topic: Demonstrative