student前加什么.是most,all还是some

student前加什么.是most,all还是some most student 的 student 要加 s 是all the student还是all the students 请问 high school student前加a还是an one of neither of all of some of 加 them 是单数还是复数 Jason is the most hard working student()all the student 如何判断一个形容词的比较级或最高级是加more most还是自己词上变为er est?还有more most前要不要加t at least one student 后加复数动词还是单数动词?most than one student 还有2个 trip前加什么介词是in on 还是 at power的最高级是加est还是加the most? 英语形容词最高级是加most还是加est common的最高级是加est还是加most