how long is it since you last saw her?since 不是用在现在完成时吗
问题描述:
how long is it since you last saw her?
since 不是用在现在完成时吗
答
it代表时间,since从...到现在
how long is it since you last saw her?
从你上次见到她到现在,有多长的时间了?