The tilde (~), is only used on nasal diphthongs such as ⟨ão⟩ and ⟨õe⟩ , plus the final ⟨ã⟩ , which replaces the -am ending, as the latter is reserved for verbs, e.g., amanhã 'tomorrow'.
Die Tilde (~) ist bloß bei Nasaldiphthongen in Gebrauch, wie ⟨ão⟩ und ⟨õe⟩ , plus vor auslautendem ⟨ã⟩ , das die -am Endung ersetzt, da letztere für Verben reserviert ist, vgl. amanhã („morgen“).