"what if "后面的动词要用虚拟语气还是正常时态?

问题描述:

"what if "后面的动词要用虚拟语气还是正常时态?
比如说:万一火把你的炉子给烧了怎么办?
应该是:what if the fire burns your stove?
还是:
what if the fire burned your stove?
现在先不加分,答对者给5分

应该是:what if the fire burns your stove?
e.g.What if the train is late?
What if she forgets to bring it?