wear a shirt and tie,这里为什么不用a tie?

wear a shirt and tie,这里为什么不用a tie? If I were you,I’d wear a shirt and tie.这里的tie是动词还是名词?为什么? if I were you,I'd wear a shirt and tie 中“tie”为什么不是复数 wear a collar and tie / wear a suit and tie 穿着衬衫打着领带 为什么 tie If I __you ,I 'd wear a shirt and tie （be)填什么? if l were you,l'd wear a shirt and tie Today is a blue shirt and red tie day don't 后面一般跟什么否定词. 例句：You don't __[不必]wear a shirt and tie. If I were you I'd wear a shirt and tie.If I were you,I'd tak they usually wear a collar and tie going to work He always wear a collar and tie for work Here ( ) a tie and a shirt for you.A.is B.are C.has D.have