When and why he came here ___ yet 为什么横线上的谓语动词用单数

When and why he came here ___ yet 为什么横线上的谓语动词用单数 when and why he came here _____ yet. When and why he came here ________ yet.选什么 When and why he came here () yet?A is not known B are not kn When and why he came here ________ yet.A.is not known B.are 主语是when and where,谓语动词用单数还是复数?为什么? when and where 引导的主语从句谓语动词用单数还是复数 请英语帝,讲解这道题when and why he came here _______yet.a\is not know one hour and a half谓语动词为什么用单数? 第一题先行词为什么在句中作状语,这是怎么看出来的?下面这句话谓语动词为什么用单数?when and where不是应该用 为什么each做主语 谓语动词用复数 而 each.and each.谓语动词用单数 She and me 后面的谓语动词用单数么