I'd like to find some reliable (online) source on the use of es to introduce something to appear later in the sentence, for example Ich bin es, Hannah. The normal trend for German seems to be to conjugate the verb according to es: Wie geht es dir?, Es ist mir kalt. etc. But in this case it seems that in German, contrary to English, you conjugate according to what is being introduced; in English you'd say "It's me," never "I am it." You can construct other examples as well:
- Er ist es, der Mörder. (It's him, the murderer.)
- Sie sind es, die Riesenameisen. (It's them, the giant ants.)
So it's not really an idiom or even an expression since really it's just a rule of grammar that works differently from the corresponding rule in English. But mostly this conclusion is conjecture and inference on my part, though it seems DeepL knows about it, and I'd like to see something authoritative to verify it (assuming it's true). The dictionaries and grammars I've found don't seem to cover it, so I was looking for some help to find one.
Just to clarify, since someone suggested another thread to answer this and apparently I need to, I'm not looking for a translation of the phrase. I said at the start of the question, I'm looking for a reliable reference for the grammar being used. Before asking anything here I do try to do all due diligence, run it through various online dictionaries, check for duplicate questions here etc. So I was aware of the meaning; in fact it's in the title.