A good grammar book (series), flashcard decks with example sentences (not only vocabulary) and audio by native speakers e.g. from , native media of your choice with subtitles, for some you might be able to use dual subtitles in both your and the original language (some local media players support that, or e.g. ).
A good grammar book (series), flashcard decks with example sentences (not only vocabulary) and audio by native speakers e.g. from , native media of your choice with subtitles, for some you might be able to use dual subtitles in both your and the original language (some local media players support that, or e.g. ).