The tns-values pres, impf, fut and past can cooccur with the vf-m-value ind; the tns-values pres and impf can cooccur with the vf-m-value sub; the tns-value pres can cooccur with the vf-m-values impr, cond, inf; the tns-values pres and past can cooccur with the vf-m-value part.
Notice that only simple verbforms are specified on the morphological level in the lexicon; in other words, compound tenses are not specified as such on the morphological level.
It can happen that for some defective verbs all tns-values are not realized.