She has improved her English...

[Fire Fly]

Hi!
My question here is:
She has improved her English...
A. She learns with a good teacher.
B. learning with a good teacher.
C. that a good teacher learns from her.
D. when learned with a good teacher.

The key is "B. learning with a good teacher" while my answer is "D" when learned with a good teacher." What I have understood here is that "She has improved her English when she has been learned with a good teacher. I am so confused! Who can get me out?

[Mkostya]

But "she has been learned" is perfect passive form, isn't it? May be you meant "she has been taught by a good teacher"?

[Nevermind]

Because present perfect is accomplished tense.

[Mkostya]