求解释有关知识点.1.Please remain （seated）；the winner of the prize will be announced soon.2.This is the first time we （have seen）
问题描述：
求解释有关知识点.1.Please remain （seated）；the winner of the prize will be announced soon.2.This is the first time we （have seen）a film in the cinema together as a family.
答
remain作联系动词,后面加adj,表示保持一种什么状态
this is the first time+现在完成时
this was the first time+过去完成时
很高兴为你解答,不懂追问~