Question

I was astudent five years ago改为否定句和一般疑问句？

Answer 1

句子中有be动词变为否定句时，直接在be动词后加not，变一般疑问句直接把be动词提到句子开头。第一人称一般改为第二人称。
I wasn't a student five years ago.

Were you a student five years ago？

Answer 2

一般疑问句为，were you a student five years ago？
否定句为，I was not a student five years ago

Answer 3

I was a student five years ago.5年前我是一个学生，这是主系表结构的肯定句，改为否定句为I was not a student five years ago，5年前我不是一个学生。一般疑问句be动词提到句首， Was I a student five years ago？5年前我是一个学生吗？

Answer 4

否定句:I wasn't a student five years ago.一般疑问句:Were you a student five years ago?

Answer 5

此句为一般过去时，若改为否定句，就在was后加not即可。若变为一般疑问句，将was移到I之前，也就是说移到句首即可。