the other student act dog.act后面需不需要加s?

要不要加s你就看student是单数还是复数啊
如果是student当然要加s,如果是students就不用加了哦
你要表达the other student,就是剩下那个学生扮演小狗,那就是一个人,要加s喽
正如楼上说的,应该是acts as a dog

当然要啊,不过这个句子很奇怪,,最好改the other student acts as a dog.