Question

帮忙翻译一句英文 读了半天没读明白 谢谢啦

It is customary (in the USA) for a student to not share a letter of recommendation with other students who attend the same school as a teacher sometimes feels he/she cannot write a letter of recommendation for some students.

Answer 1

1.翻译：（在美国的）习惯做法是，一个学生不得与申请相同学校的其他学生分享推荐信，因为教师有时感到他/她不能为几个学生合写一封推荐信。
2.结构：It 是形式主语，is 是系词，customary 是表语。所以整个主句是“主系表”句型。(in the USA) 是地点状语，for a student 是后面不定式的逻辑主语，to not share a letter of recommendation with other students 是不定式短语作实际主语，who attend the same school 是定语从句，as a teacher sometimes feels 是原因状语从句，he/she cannot write a letter of recommendation for some students 是宾语从句。