1.He is having lunch.(改为否定句） He __ __ having lunch.

1.He is having lunch.(改为否定句） He __ __ having lunch.
2.they are enjoying themselves now .(改为同义句）
they are __ __ __ __ now.
3.lucy is playing the piano at home now.(改为一般疑问句)
___ lucy ___ the piano at home now?
4.the boy is ( eating an ice cream) now.(对划线部分提问）
__ is the boy __ now?
5.(the girl) is writing postcards.（对划线部分提问）
__ is __ postcards?

1.is not
2.having a good time
3.Is playing
4.What doing
5.Who writing