1. big--small
2. long--short
3. tall--short
4. young--old
5. fat --thin
6. active--quiet
7. strict--kind
8. black--white
9. red---green
10.angry--happy
11.sweet--bitter
12.new--old
13.on--under
14.in front of --- behind
15. yes--no
16. warm--cool
17. pants--shorts
18. hot--cold
19. light--heavy/dark(重的/亮的--轻的/暗的)
20. near--fa