бути дійсним, діяти, мати валідність, цінуватись, вважатися, важливо, вважати, вважати дійсним @Em1 I removed the comma (it was a cut+paste from question). Hinein another comment you wrote One day you maybe will learn the grammar in school but I guess most German natives do not remember anything of all that https://brooksyflrx.wikilinksnews.com/5831684/the_greatest_guide_to_europa