虚拟语气主句可用 Sb could do sth 吗？

Question

虚拟语气主句可用should ,would 还可用“ could ” 吗？
你这个，if i were a bird ,I could fly in the sky 。请问这句可以吗？
按照语法书上的是：I would fly .

Answer 1

可以啊。

因为你虚拟的实现在。从句用了were，主句用一个适当的情态动词。

would could 都可以

Answer 2

可以用的