we can open the door.的否定句、一般疑问句、肯定回答、否定回答和划线部分提问各是什么?

题目

we can open the door.的否定句、一般疑问句、肯定回答、否定回答和划线部分提问各是什么?
划线部分是open the door

答案

We can't open the door.
Can you open the door?
Yes, we can.
No, we can't.
What can you do ?