我已经工作三年了——英文怎么说？

I have been working 3 years.

I have been working for 3 years.

还是
I have been working for 3 years.比较恰当。

I have been working for 3 years（现在还工作）
I have been worked for 3 years (现在以不工作了）

i have been worked for 3 years.
这个句子没有明显的强调进行时态，所以用现在完成时就好了

I have been worked for three years.