They have lunch at 12;00.(对12;00部分提问)

问题描述:

They have lunch at 12;00.(对12;00部分提问)
( )( )they ( )lunch?
2.we are haveing music class (改为一般疑问句)
( )( )( )music class?

( When )( do )they ( have )lunch?
主语是they,所以助动词用 do
( Are )( they )( having ) music class?
这个句子有助动词,所以只要把助动词提前就好了.