Just 一問

1. I finished just my homework. 是錯的。
因為just是adv(副詞),just該放在動詞前,所以沒有finished just這回事。

2. 若你想表達「只是」的意思,該用only:
I have only finished my homework.

3. I have just finished my homework. 是正確的。
just在這裡解作「剛剛」的時間性,全句意譯「我已剛剛做好功課了。」

4. 有關問者補充的兩行文句,文法不通,現簡化及修正如下:
- Does the former one (前者) mean that I have only finished the homework out of the various (多種的) work load (工作量)?
{錯! just在這裏並非解作「只是」。}

- Does the latter one (後者) mean that I have finished my homework for a while (一會兒)?
{對! just在這裏解作「剛剛」,剛做好一會兒。}

But,,,I think...........
I just finished my homework
This is better than<i>

**I hope I can help you**</i>