In grammar, infinitive's the name for certain verb forms that exist in many languages. In the usual (traditional) description of English, the infinitive of a verb's its basic form with or without the particle to: therefore, do and to do, be and to be, and so on are infinitives. As with many linguistic concepts, there isn't a single definition of infinitive that applies to all languages. Many Native American languages and some languages in Africa and Aboriginal Australia simply don't have infinit… (More on Infinitive)