We water the flowers once a week.(我們每周給花澆水一次。)

My mother cooks it once a week.(我媽媽每周都要做一次給我吃。)

This patient got treated once a week.(這位病人一周做一次治療。)

Water the plant once a week if you are to get fruit in the autumn.(如果你想秋天收獲果實就要每周給植物澆一次水。)

We tend to meet up for lunch once a week.(我們往往會每周共進一次午餐。)

You should see your doctor every 2 weeks until 36 weeks, then once a week until you deliver the baby.(懷孕到36周前每隔兩周要看一次醫生，36周后開始必須每周都要去醫生那兒檢查一次，直到您分娩為止。)

The train operates the 2,400-mile round trip once a week.(這列火車每周進行一次2400英里的往返旅行。)

I do exercises for legs approximately once a week and most of my leg workouts include ballet movements and yoga stretching.(我大約每星期一次做腿部運動，而且絕大部分的腿部訓練包括芭蕾舞步和瑜伽伸展運動。)

Lung cells die and are replaced about once a week.(肺細胞約每周死亡、更新一次。)

To help me with that task, Mrs. Pillar volunteered to come to the hospital and later to my house once a week.(為了幫助我完成那項任務，皮勒太太自愿每周去一次醫院，然后到我家來。)