The leading use of the subjunctive I in German will be the oblique speech, these tenses are much less Utilized in the German language. You could consult with the lesson focused on the usage of the subjunctive I in German. продавать, продать, сбывать, сбыть, продаваться, продаться See German conjugation versions https://englandr630jrw6.wiki-jp.com/user