Breakdown of Aufgrund der Studie bleibt abzuwarten, ob die Wirksamkeit hoch ist.
sein
to be
bleiben
to stay
hoch
high
zu
to (infinitive marker)
ob
whether / if
aufgrund
due to
die Studie
the study
abwarten
to wait and see
die Wirksamkeit
the efficacy
Questions & Answers about Aufgrund der Studie bleibt abzuwarten, ob die Wirksamkeit hoch ist.
Why is there no es in this sentence, even though the lesson is about es bleibt zu constructions?
In the phrase es bleibt abzuwarten, the es is just a placeholder (a "dummy subject") for the real subject, which is the entire ob clause at the end. Because this sentence puts the phrase Aufgrund der Studie in position 1, that placeholder es is no longer needed to kick off the sentence and is completely dropped. If you wanted to start with the dummy subject, it would be: Es bleibt aufgrund der Studie abzuwarten, ob...
Why is zu written in the middle of the word abzuwarten?
The base verb is abwarten (to wait and see), which is a separable verb. Whenever you use a separable verb in a zu + infinitive construction, the zu must be squeezed directly between the separable prefix (ab-) and the core verb (warten), joining them into a single word: abzuwarten.
Why is the article der used before Studie if it's a feminine noun?
The preposition aufgrund (due to / based on) requires the genitive case. For feminine nouns like die Studie, the definite article changes to der in the genitive case.
How would the grammar change if I used a plural noun instead of the ob clause?
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