频度副词often,always,sometimes等在句中有什么样的规律,并举例

频度副词有：once,twice,always,usually,often,sometimes,never,(seldom),ever,
等等。
频度副词一般放在be动词之后或者助动词与主要动词之间,但sometimes、often等还可以放在句首或句尾,usually可放在句首,once可放在句尾,twice、three times等一般放在句尾。如：Sometimes I get up early.(我有时起得早)/ The workers usually have lunch at the factory.(工人们通常在厂里吃午饭) / Take this medicine twice a day.(这种药一天吃两次)

always 表示最频繁often 次之sometimes 有时候 频率最低I always go to school on time.我每天上学都不迟到I often go to school on time.我一般来说上学都不迟到Sometimes I go to school on time.我有时候上学不迟...