请把下列的句子改成否定句

题目

请把下列的句子改成否定句
1.I am keen on English
2.He is good at math
3.She is a worker
4.You are a good student
5.They are in school

答案

1.I am not keen on English
2.He is not good at math
3.She is not a worker
4.You are not a good student
5.They are not in school