4. (a math contest) Elizabeth
has already won a math contest
1.( Two yo-yo world's records) John
has already set two yo-yo world's records
6. (University math classes) Elizabeth
has already taken university math classes
3. (more than 300 chess games) John
has already won more than 300 chess games
5. (high school) Elizabeth
hasn't finished high school yet
2. (every trick) John
Hasn't learned every trick yet