I've seen verbs in the present tense masculine plural (invariable gender) with an omitted (personal pronoun or noun) subject, that don't refer to the impersonal ("you/one/they") actions as in: "הולכים\זזים\ממשיכים!" (Let's go!) or in expressions like "?מה עושים" (What do we do?) If I do not err, the missing subject must be "we" and the meaning of this construction is cohortative "let us.../we should...." Since it does not inflect for gender this usage seems to have already been fossilized in this form for some reason. Where else/in what register is this usage still productive? What are the other usages of the present tense mp with an omitted non-impersonal subject?