If your feet ______(be) smaller,you could wear my shoes如题.为什么要用were而不用are？

If your feet ______(be) smaller,you could wear my shoes如题.为什么要用were而不用are？
If your feet ______(be) smaller,you could wear my shoes
如题.
为什么要用were而不用are？

If your feet ______(be) smaller,you could wear my shoes如题.为什么要用were而不用are？
If your feet are smaller,you could wear my shoes
假如你的脚小点,你就能穿我的鞋了.
此句为虚拟式.结构为：if+过去式.,could/would.
补充：为什么要用were而不用are?因为虚拟式的固定形式就是过去式.这个应该记住.

were 这个是虚拟语气

were 虚拟语气 表示不可能发生的情况
假如你的脚小一点，你就可以穿我的鞋子

were

were 虚拟语气