合并Jack can sing .He can/t sing well.
he can sing (very well)括号提问
he can sing very well,and
He can sing well 改为附加疑问句.
I can't sing.I can't dance.合并句子
对Yes,he can.He can sing well提问
I can sing.I can't dance.合并句子
he can't sing,()he can't dance填什么
he can sing very well,对very well提问
lucy can [sing]very well
She can sing some English somgs,but can't sing well.
As well as -----the piano,he can sing .
He can sing very well.(改为同义句)