Looking on the internet deeply has found these results:

I have been studying English for 10 years. is the most popular phrase on the web.

I have studied English for 10 years. 13,800 results on the web	I have been studying English for 10 years. 14,720 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I haven't even seen Andrew for 10 years. I have been in the "biz" for 10 years. By next April will you have studied English for ten years? I've studied English for five years. I haven't skied for 10 years. I haven't touched it for 10 years. I've studied English for five years. I have served you for 10 years.	As a philosopher and social scientist, I have been studying these questions about the concept of parenthood. Spencer and I have been studying videos online. We have been studying cult indoctrination on a microlevel for years. As a biologist, I have been studying monarch butterflies for the last 10 years. The monks have been studying these things for 10000 years. I have been studying the preliminary reports of the test. Mr Strange, I have been studying magic for 40 years. I have been studying the monitoring reports since the storms.

I have studied English for 10 years.

13,800 results on the web

I have been studying English for 10 years.

14,720 results on the web

More popular!

As a philosopher and social scientist, I have been studying these questions about the concept of parenthood.
Spencer and I have been studying videos online.
We have been studying cult indoctrination on a microlevel for years.
As a biologist, I have been studying monarch butterflies for the last 10 years.
The monks have been studying these things for 10000 years.
I have been studying the preliminary reports of the test.
Mr Strange, I have been studying magic for 40 years.
I have been studying the monitoring reports since the storms.