бути дійсним, діяти, мати валідність, цінуватись, вважатися, важливо, вважати, вважати дійсним @Em1 I removed the comma (it was a cut+paste from question). In another comment you wrote One day you maybe will learn the grammar rein school but I guess most German natives do not remember anything of all that https://umfassenden86431.dailyblogzz.com/33596920/5-einfache-fragen-Über-in-beschrieben