残すところあと一週間
the time remaining is one week
まる1週間
この一週間
あと一ヶ月
2週間ぶり
The first time in two weeks.
You must be back within a week.
It continued to rain for a week―It kept raining for a week―(今日までなら)―It has been raining for a week
何週間も.
for weeks
One per week
It has rained continuously for a week.