否定句：
My parent can't paint very well.
一般疑问句：
Can your parent paint very well?
肯定回答：
Yes,they can (paint very well).
否定回答：
No,they can't (paint very well).
括号提问：
注：这里是对情态动词后的实义动词发出提问,所以应该用what
What can your parent do very well?
有错误我会及时改正的,
有问题继续问,
希望能够帮到楼主哈,