everyone做主语时谓语动词用单数形式还是复数形式

　　例句：

　　There aren't enough books for everyone to have one each.

　　书不够给每人发一本。

　　Everyone would stand up when the teacher entered the classroom.

　　老师走进教室时大家都会起立。

　　We can finish this job on time if everyone does their bit.

　　要是每个人都尽职，我们就能按时完成这项工作。