大学一年级和你大几用英语怎么说

这要依据语境而定了，一下的仅共参考。
大学一年级

玛丽大学一年级。
Mary is in her freshman year.
富于幻想的大学一年级生
a viewy freshman
为大学一年级新生拟制教学大纲
Plan a programme of lectures for first - year students
杰克决定大学一年级住校学习。
Jack decided to live in during his freshman year at college.
这条规则只适用于大学一年级学生。
This rule applies to freshmen only.
你在大学一年级时，是否各门功课都得优。
During your first year of college,did you make straight A's?
老师对大学一年级学生讲得太平淡无奇了，他们都感到厌烦。
The teacher talked down to the freshmen,and they were bored.
他与一群花花公子交上了朋友，以至大学一年级两门课程不合格。
He got in with a group of playboys and failed two freshman courses.
大学一年级的时候，他晚上在一个实验室里当洗瓶子的工人。
During his first year in college,he work as a bottle washer in a laboratory in the evening.
吉尔的脑子真笨，读大学一年级时门门课都不及格。
Jill is such a blockhead that the flunked every course as a freshman
你大几

what grade are you in?

大一 freshman
大二 sophomore
大三 junior
大四 senior
以上都是口语，但是现在使用非常普遍

what grade are you in your collage?

大一 frosh
大二 sophomore
大三 junior
大四 senior

大一学生：freshman
大二学生：sophomore
大三学生：junior
大四学生：senior