in a few days after a few days用法区别

问题描述:

in a few days after a few days用法区别

in a few days 几天以后(以内) 用于将来时
I"ll be back in a few days.(从说话时算起)
after a few days 几天以后 (用于过去式)
I was back after a few days.(从离家时算起)