бути дійсним, діяти, мати валідність, цінуватись, вважатися, важливо, вважати, вважати дійсним @Em1 I removed the comma (it was a cut+paste from question). Rein another comment you wrote One day you maybe will learn the grammar hinein school but I guess most German natives do not remember anything of all that https://einblick87531.slypage.com/33607549/deshalb-can-be-spaß-für-jedermann