I is eating lunch变成一般疑问句怎么变?

I is eating lunch变成一般疑问句怎么变? Jenny is eating lunch.(变一般疑问句) tom is eating lunch(改为一般疑问句) i'm eating lunch.的一般疑问句 I'm eating lunch. I'm picking up leaves.(把句子变成一般疑问句,不改原意.） 把it is a sheep变成一般疑问句,怎么变? she is a univesity student变成一般疑问句怎么变 把I can sing 变成一般疑问句,怎么变? I am marry.变成一般疑问句怎么变? dogs like eating dones变成一般疑问句 she is looking at the flowers?变成一般疑问句怎么变? I can not swim.变成一般疑问句怎么变?要用否定问吗?