ofen,usually,always哪些词可以放在句首,哪些可以放在句末,哪些放句中

英语中,Ofen、 Usually、Always 这些词后面 都应该加动词的什么形式啊. usually sometimes always ofen never 它们有什么区别?和具体用法 如何区别usually和ofen? ofen,usually,always哪些词可以放在句首,哪些可以放在句末,哪些放句中 英语频率副词排序从高到低：once,usually,ofen,sometimes,always,twice,never,hardly ever,three times. usually,sometimes,ofen后面动词（）. sometimes,almost always,not very often,often,always,very often,hardly ever,not ofen,quite often,usually 该如何排列它们的大小请从大到小排列是always开头的 always,often,usually用法 nerver seldom often usually always usually和always的区别 usuai、usually、always的区别 usually/always/often可以替换使用吗? 用always,usually,never三词各造两句英语句子. always usually often 的区别在什么地方 按顺序排列 ofyen always usually sometimes never usually often always的区别 求详细 sometimes often usually always never 造句 always,usually.often.sometimes,seldom,分别是什么意思