Pls.send me your ID card and I will come to your school once getting it.这里为什么用Getting而不用Get?两者有什么区别?

问题描述:

Pls.send me your ID card and I will come to your school once getting it.这里为什么用Getting而不用Get?两者有什么区别?

用getting是因为跟在once后,once是介词,介词后动词用ing形式!
原文意思:请把您的身份证寄给我,我收到后回马上到您的学校去!