There are verb forms that have the same distinctions of person, tense and aspect as are found in main-clause verbs, but which indicate them using special forms distinct from those of main clause verbs.[1] There are verb forms that do not have the distinctions of person, tense and aspect found in main-clause verbs, such as participles. These are used for certain types of subordinate clauses in English like "Being so busy, I couldn't come home." There are verb forms that add extra morphemes never found on main clause verbs.