Book Nav 3rd Conjugation 3rd Conjugation -io Verbs 187. The 4th Conjugation includes all verbs which add ī- to the root to form the present stem. Charts PDF 4th_conj_pres.pdf 4th_conj_imperf.pdf 4th_conj_future.pdf 4th_conj_perf.pdf 4th_conj_plperf.pdf 4th_conj_fut_perf.pdf XML Files Chapter-187.xml