求一般现在时 一般过去时标志词.

问题描述:

求一般现在时 一般过去时标志词.

恩★一般现在时:often,usually,always,sometimes,never,seldom,every week/day/year/month...,once a week,on Sundays(在某天具体的时间)★一般过去时:ago,yesterday,the day before yesterday,last week/year/ni...