Questions & Answers about Ich habe eine Socke verloren.
Why doesn't the past participle verloren start with ge-?
Verbs that start with an inseparable prefix, like ver-, do not take the ge- prefix in the past participle. Other common inseparable prefixes are be-, ent-, and er-.
How do we know eine means "one" rather than "a" sock here?
Grammatically, eine is exactly the same for both "a" and "one". In spoken German, you simply put heavy vocal emphasis on eine to mean "one". In writing, context usually makes it clear, or you might see it written as a number.
Can I use verlieren to say "I am lost"?
No, verlieren only means losing an object or losing a game. If you want to say you yourself are lost while walking around, you need the reflexive verb sich verlaufen, as in Ich habe mich verlaufen.
What are the other tense forms of verlieren?
It is an irregular verb that changes its stem vowel. The simple past (Präteritum) is verlor and the past participle used here is verloren.