Metrics is among the Arabic discipline that known with claddical and unchanged nature. However, this science is liable to be developed. In this study, the researcher proposes a new approch in which he tries to attach a metre called Mukhal al-basiit to another one called al-Munashir and applying this approach on pre-Islamic peotry. The researcher does claim infallibility of his view, but rather he accepts anyexplaining or corrections.