Questions & Answers about Wir haben unser Haus verkauft.
Why doesn't the past participle have a "ge-" at the beginning, like "geverkauft"?
The verb verkaufen (to sell) starts with ver-, which is an inseparable prefix. Verbs with inseparable prefixes do not add ge- in the past participle. You just keep the prefix ver-, use the verb stem kauf, and add a -t at the end to make verkauft.
Why is verkauft at the very end of the sentence?
This is the standard word order for the conversational past tense (the Perfekt) in German. The helping verb, which is haben here, takes the second position in the sentence, and the past participle (verkauft) is pushed to the very end.
Why is it unser Haus and not unseren Haus or unseres Haus?
Haus is a neuter noun. Because it is the direct object in this sentence (the thing being sold), it is in the accusative case. For neuter nouns in the accusative case, possessive words like unser (our) do not take any extra endings.
The English translation is "We sold", but doesn't Wir haben mean "We have"?
Yes, a literal translation would be "We have our house sold." However, conversational German relies heavily on this two-part past tense to talk about things that happened in the past. It naturally translates to both "We sold" and "We have sold" in English.