不明白regard在这为什么用ing形式.

2个回答

egarding [ri'ɡɑ:diŋ; ri:-]
prep.关于；至于；就…而言；在…方面：例句:I had nothing to say regarding this matter.
对于这件事我无话可说.Regarding money,that's no problem.
至于钱嘛,那不成问题.
this medical questionnaire aims to identify participants 主句,who句指代participants,regarding引起条件状语从句