Question

If I __you ,I 'd wear a shirt and tie （be)填什么?

Answer 1

were

虚拟语气：与现在事实相反.

从句（条件句）：If+主语+过去式；主句：主语+would/could/shouls/might+do.

If I _were_ you, I 'd wear a shirt and tie. 如果我是你,我就会穿衬衫,戴领带.