To use boastful language, boast: he bragged endlessly about his high score
1. hast
2. haben
3. habt
4. haben
5. habe
It's the first, because "Wurst" is male and singular
there are 4 groups of adverbs in german
Adverbs of Place
Adverbs of Time
Adverbs of Manner and Degree
Adverbs Indicating Cause
i found this on https://www.thoughtco.com/learning-german-adverbs-1444449 if you wanna look your self hope this helped