Student or Learner
Should I use passed or passing in my sentence?
My achievement is that most of my students passed/ passing their exams.
I think both passed and passing are correct, because “My achievement is that” can be followed by a noun or a sentence. When I use “passed”, “most….passed their exams” is a sentence. When I use “passing”, “most…passing their exams” is a noun.
(Not a teacher) (1) My greatest achievement is that my students PASSED their exams. (My students passed their exams = noun clause in apposition with "that." (2) My greatest achievement is my students' (use apostrophe) PASSING their exams. (My students' passing their exams = gerund phrase serving as subject complement.)
"Most of my students passed their exams" is correct. Used after the exams have been graded
"Most of my students ARE passing their exams" Use this sentence when the exams are being graded.
Remember! Passed--past tense. Passing can be in different tenses depending on the helping verb, but use logic to determine which helping verb you should use.