cpt必須在OPT之前嗎

我OPT快到期了，又沒有及時遞交H1B申請，能不能轉CPT呢？

CPT is for the students who are in pursue of a degree. OPT is for student who already graduted.Both of them are 12 months. People would lost their OPT if they go over 12 months for their CPT. I guess you can only get CPT if you return to school.