I always do exercise once a week
I usually go to school by bus
She often does homework four or five times a week
He sometimes watches TV
I hardly ever go to movies
I never drink milk
He seldom swims in the sea.
二.表频率的短语
1. once a week /year/... 一周/年一次
twice a month 一月两次
three times a term 一学期三次
two or three times a week 一周二、三次
2. every day 每天
every year.... 每年
3. every five minutes 每五分钟
every four years 每四年
4. every other day 每隔一天一次
三.对频率提问用How often