我一定一個禮拜3到4次，待在圖書館裡學習

我一定一個禮拜3到4次，待在圖書館裡學習

結果 (英文) 1:

I have 3-4 times a week, stay in the library studying

結果 (英文) 2:

I must be studying in the library three or four times a week.

結果 (英文) 3:

I must study in the library three or four times a week