And there are in this certain boundaries also within the language itself:

With uncleanness that exits one’s body, it will talk about a man who is unclean by way of a noun, not by way of a verb. As when it says with respect to men who are unclean as a result of a urethral secretion and women who are unclean as a result of intermenstrual bleeding טמא הוא טמאה היא (he is unclean, she is unclean). And moreover in Leviticus 15:2 (where it does not attribute uncleanness to the action of the priest in intensive conjugation וטִמאו הכהן – the priest shall pronounce him unclean), it says טמא הוא (his issue is unclean).

It will only speak by way of a verb if it speaks words concerning men who are unclean as a result of a urethral secretion or women who are unclean as a result of intermenstrual bleeding or a law in which one remains unclean after ritual immersion.