often在句子用什么时态 最好说清楚些 急求

理论上often没有限定时态吧,但是不太会用在将来时--因为还没发生你怎么知道会“often”..
现在时和过去时都可以吧.看你要表达什么意思了.
过去范畴：
例：我小学的时候常常玩这个游戏
When I was in primary school,I often played this game.
现在范畴：
例：我常常睡过头
I often overslept...
同理,完成时也可以
例：最近一周我常常睡过头
I have often overslept over the past week
或过去完成时
例：上小学之前我常常玩这个游戏
I had often been playing this game before primary school.
例子比较冷不过希望能说明问题.spend?