排列英文频率副词,从高到低:once,usually,often,sometime,always,twice...答:always,usually,often,sometimes,hardly ever,three times,twice,once,never 以上按照频率从高到低,一般用于一般现在时。我是英语老师。其实还有一个seldom.其频率比hardly ever 略高。
现在完成时态的标志词有没有once? 为什么?答:2、just, before, recently, still, lately, never, ever, twice, on several occasion, in the past/last few days/weeks/months/years, this morning/week/month/year(多用于一般过去时), so far, up to now, till now。3、since+时间点=for+时间段 since+一般过去时态的时间状语从句=...