Contractions, often known as "short forms," are typically used to combine a pronoun or noun and a verb, or a verb and not, in a shorter form. Contractions are not commonly used in professional writing. They are generally acceptable in academic writing, especially when used by students themselves. However, if you write frequently, use contracts regularly, then they will become second nature to you and be easier to use. Some common pronouns and their contracted forms are: who/who's, whom/whom's, whose/whose, which/which. Short forms are often used in journalism and advertising. Academic writers should avoid them unless there is a clear need for brevity. More information on correct use of language can be found in our custom essay writing service website.