Class _____(be)over,all the students rushed out of the classroom.Class _____(be)over.All the studClass _____(be)over,all the students rushed out of the classroom.Class _____(be)over.All the students rushed out of the classroom.其实就是all前面是逗号还是句号分别填什么的问题,请写明答案和原因
问题描述：
Class _____(be)over,all the students rushed out of the classroom.Class _____(be)over.All the stud
Class _____(be)over,all the students rushed out of the classroom.
Class _____(be)over.All the students rushed out of the classroom.
其实就是all前面是逗号还是句号分别填什么的问题,请写明答案和原因
答
was
has been
答
1.being, 独立主格结构。注意标点符号是逗号。
2. was 两个独立的句子，中间用句号隔开。
答
逗号 一句话里,没有连词,就只能有一个谓语,所以前面要作为状语,class与be没有被动关系,因此用being（如果遇见有被动关系的,动词要用分词）
句号 两句话里,时态保持一致,be用过去式was
答
was