英语翻译1、一星期一次,2、一星期两次,2、一星期三次,3、一星期四次.4、一个月一次,一直到一个月三次.6、大多数学生7、没有学生.8、一周三四次.请帮忙把这些翻译成英语短语!

once a week
twice a week
three times a week
four times a week
once a mouth
up to three times a mouth
most of students
none of students
three or four times a week