二十个表达频率的词组
1. a few times
1.几次
2. all the time
2.总是
3. almost always
3.几乎总是
4. almost never
4.几乎不
5. at times
5.有时，偶尔
6. constantly
6.经常
7. every hour
7.每小时
8. every now and then
8.不时地，常常
9. every third day
9.每三天
10. four times
10.四次
11. frequently
11.经常
12. hardly ever
12.几乎不
13. nearly always
13.几乎总是
14. now and then
14.偶尔，有时
15. off and on
15.断断续续地，时不时地
16. on the fifteenth of every month
16.每个月十五号
17. once in a blue moon
17.千载难逢，极为罕见
18. once in a while
18.偶尔，有时
19. three times a week
19.每周三次
20. twice a month
20.每个月两次
