You can see the boat.(改为否定句)

You can't see the boat.

You can see the boat.
否定：You can't see the boat.

(补充：
一般疑问句：Can you see the boat?
特殊疑问句：1)对the boat提问
What can you see?
2)对see the boat提问
What can you do?
3)对you提问
Who can see the boat?)

随便用阿~~
呵呵~~~

You can't see the boat.
将CAN否定就可以啦

You can not see the boat,

You can not see the boat.