陈述句改疑问句

My mother was a doctor bettl.            There were five ciasses yesterday.          There were good friends before.       She has got a toy bike.     I read English every day.                My teachers teach us Maths.     这几个句子怎么分别改为否定句和疑问句？

My mother was a doctor bettlbefore.

My mother wasn't a doctor before.

Does your mother a doctor before?

There were five ciasses yesterday.

There were not five classes yesterday.

Were there five classes yesterday?

There were good friends before.

There were not good friends before.

Were there good friends before?

She has got a toy bike.

She hasn't got a toy bike.

Has she got a toy bike?

I read English every day.

I don't read English every day.

Do you read English every day?

My teachers teach us Maths.

My teachers don't teach us Maths.

Do your teachers teach you Maths?