下面的翻译对吗？为何？我每周工作一天。
1.I work a day every week.
2. I work one day a week.
3.I work a day for every week.
4.I work one day in every week.
5.I work one day at every week.
6.I work a day at a week.
7.I work a day each week.
我每周工作一天。
1.I work a day every week.
2. I work one day a week.
3.I work a day for every week.
4.I work one day in every week. （错误）
5.I work one day at every week. （错误）
6.I work a day at a week. （错误）
7.I work a day each week.
【说明】“every + 单数名词”作时间状语时，无需与介词连用。第6句的 a week 表示 every week 的意思。
