回复:5楼
这个不是太严格的,不变也行。ago-before那个就是2years before.我再补充一下吧:时间状语的变化直接引语变间接引语时,有些时间状语根据情况也要相应的改动。如:如将now改为then,将today 改为that day,将tonight改为that night改为,将yesterday改为the day before,将this month改为that month,将last week改为the week before,将three years ago改为three years before,将tomorrow改为the next day,将next year改为the next year