Present Perfect Continuous Tense

I have been studying English.

Remember that in many cases, there is no difference in meaning between the Present Perfect tense and the Present Perfect Continuous tense.  The Present Perfect Continuous emphasizes the action will continue into the future.

Contrasting Tenses:

I have studied English since I came to Canada.  (I might be finished studying.)
I have been studying English since I came to Canada. (I'm continuing to study English.)

For additional practice:

http://www.englishpage.com/verbpage/verbs7.htm