Question 1

How does the prefix ent- change the meaning of the base verb fallen in this sentence?

Accepted Answer

The base verb fallen means "to fall." As we learned in this lesson, the inseparable prefix ent- often indicates removal, separation, or something moving away. So entfallen literally means "to fall away" or "to escape." In this context, it means the password escaped or "slipped away" from the speaker's memory.

Question 2

Why do we use the dative mir here instead of making "I" the subject like in English?

Accepted Answer

In English, we usually say "I forgot the password." But with entfallen, the forgotten thing (das Passwort) is the grammatical subject doing the action—it is what "slips away." The person who forgets is put in the dative case (mir) to show who is affected by this event. It translates somewhat literally to "The password fell away from me."

Question 3

What tense is entfiel, and how would I form it in the spoken past (Perfekt)?

Accepted Answer

entfiel is the simple past (Präteritum). The base verb fallen is a strong verb that changes its vowel in the past to fiel. Since the prefix ent- is inseparable, it stays firmly attached. In the spoken past (Perfekt), you would say: Das Passwort ist mir plötzlich entfallen. Notice that it uses ist, not hat, because fallen implies a change of state or motion!

Question 4

If I want to emphasize that it happened suddenly, can I start the sentence with plötzlich?

Accepted Answer

Yes! You can move the adverb to the front of the sentence: Plötzlich entfiel mir das Passwort. Just remember the golden rule of German word order: the conjugated verb (entfiel) must stay in the second position, so the subject (das Passwort) is pushed behind the verb.

Das Passwort entfiel mir plötzlich.

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