Mary cannot swim.
They cannot draw very well.特殊疑问句特殊疑问句:What language can she speak? 她会讲什么语？What sport activities can Mary do?玛丽会什么体育运动？What well can they draw?他们画得如何？一般疑问句:Can she speak Chinese? 她会讲中文吗？Can Mary swim? 玛丽会游泳吗？Can they draw very well?他们能画得很好吗？
有个字敲错了
What well can they draw?
应该是
How well can they draw?