“It is time that we began our class,”said the teacher.请问为什么是虚拟语气?

“It is time that we began our class,”said the teacher.请问为什么是虚拟语气?
“It is time that we began our class,”said the teacher.请问为什么是虚拟语气?

“It is time that we began our class,”said the teacher.请问为什么是虚拟语气?
it be time that结构,是该.的时候了,这个句型一定要用虚拟语气,that后引导的从句里要用一般过去时.