1.Kelly is happy.-Kelly is not happy.
2.I am sick.-I am not sick.
3.I will go to school on the weekend.-I will not go to school on the weekend.
4.Mary is hungry.-Mary is not hungry.
5.Sally is absent today.-Sally is not absent today.
6.You are my friend.-You are not my friend.
7.They are playing baseball.-They are not playing baseball.
8.She is doing her homework.-She is not doing her homework.
9.She is my cousin.-She is not my cousin.
10.You are a teacher.-You are not a teacher.