频率副词有哪些

always(总是),usually(通常),frequently（经常） often （经常）sometimes(有时),seldom(不常),rarely（极少）,never（从不） once(一次),twice(两次),等。all the time 100%；almost ,always 90%；generally ,usually 80%；often ,frequently 60-70%；as often as not 40-50%；sometimes ,at times 20-30%；occasionally ,from time to time 10%；hardly ,seldom ,rarely 5%；never 0%。