下列句子改为否定句、肯定句和一般疑问句(过去时）英语高手们速度了

No,i was not a teacher
yes,i was a teacher
was i a teacher
no,We were not happy
yes,We were happy
were us happy
no,She did not went to school at seven o`clock
yes.She went to school at seven o`clock
did She go to school at seven o`clock
no,They did not play football in the afternoon
yes,They played football in the afternoon
did They play football in the afternoon