*天之前和*天之后，分别应该怎么表达？

热心网友

十天前 ten days ago（用于一般过去时,以现在时间为参照点。) ten days before（用于过去完成时）十天后 in ten days(用于一般将来时) ten days later/after ten days (用于一般过去时,表示以过去某一时间为参照点的十天后)He went there ten days ago.He said he had been there ten days before.He will be here in ten days.He went there ten days later/ after ten days.

热心网友

XX days ago XX days before XX days earlierin XX days after XX days XX days later