在英语中,表示头衔、职位的名词前不加冠词 为什么是as a student而不是as student

在英语中,表示头衔、职位的名词前不加冠词 为什么是as a student而不是as student 高考英语as 倒装请问倒装部分是形容词加名词，那之前要不要加冠词呢 比如说：a quiet student as he 表示称呼、职位、头衔的名词作什么成分时,前面不用加冠词? 关于高一英语、冠词.He is good a student as he was.该句中不定冠词a是否放到good之前? As a student, you must study hard. as a student, As students=As a student吗? A quiet student as he may be与quiet student as he may be 的区别 一句英语句子看不懂,在“英语聊聊”吧里面看到的：As a senior three student,I do have 当职位或头衔在句中做表语宾语补足语和同位语是不用冠词的 请举例 she is as clever a student as us还是she is as a clever student as a high school student… what should do as a student