Why does substance that sublime not come to liquid state?
From a thermodynamic point of view there are two competing possibilities for condensation of a vapor:

(1) vapor $\ce{-&gt;}$ liquid, with some negative $\Delta H$

(2) vapor $\ce{-&gt;}$ solid, with an absolutely larger negative $\Delta H$

In the absence of large quantum mechanical effects (see here), the second process with a more negative enthalpy change must become favorable at a low enough temperature above absolute zero; the actual temperature where this happens  depends on the material.  So when the condensation is done at a low enough temperature, it goes directly from vapor to solid, and the reverse process of evaporation then also misses the liquid.