Konjunktiv I is used to indicate reported speech (when you are telling someone what somebody else has said). However, Konjunktiv I is seen as very formal, and so it is rarely used in spoken German.
In general, Konjunktiv 1 is often introduced earlier than Konjunktiv 2, as it is used more frequently in daily communication and is relatively easier to learn. Students may start learning Konjunktiv 1 in intermediate levels (B1/B2) and continue to refine their understanding and usage in advanced levels (C1/C2).
The German Konjunktiv II is the verb form that we use for polite requests, wishes, suggestions, theories and hypothetical situations. We conjugate modal verbs in the Subjunctive II by adding the subjunctive endings to the simple past stem and adding an umlaut.
Konjunktiv I is used for the 2nd and 3rd person singular and 2nd person plural, the Konjunktiv II for the 1st person singular and the 1st and 3rd person plural to avoid confusion. We can also use the Konjunktiv II to express a wish or desire, to make conditional sentences or to make special, polite phrases.
C1 – Advanced - German Proficient level TopicsRate of Speech The same topics as Level B2 plus the ability to speak on completely new topics spontaneously Understand a wide range of demanding, longer texts and also grasp implicit meanings 140 WPM or less
The German Konjunktiv I It's rarely used in spoken language, but you will find it in newspapers and articles.
Present Subjunctive:B2-C1. The Subjunctive is the grammatical mood showing situations that may happen or (regretfully) may no longer be possible in the past, present, or future. The Indicative mood shows real situations, or temporally rooted facts.
To express an unreal condition in the present, you need the subjunctive II (Konjunktiv II). The format is Wenn + Konjunktiv II + Konjunktiv II: “Wenn ich ihn jetzt sehen würde, würde ich ihn nicht erkennen.” (If I saw him now, I wouldn't recognize him.)
For instance, if John says, “Ich werde mich verspäten” (I am going to be late), you could report this indirectly by saying, “John sagte, er werde sich verspäten.” Here, “werde” is the Konjunktiv I form of the verb “werden.” Examples of Indirect Speech: Hans: “Ich bin 30 Jahre alt.” (I am 30 years old)
Konjunktiv I is used to indicate reported speech (when you are telling someone what somebody else has said). However, Konjunktiv I is seen as very formal, and so it is rarely used in spoken German.