I was trying to solve grammar exercise and I came through this question.
I have started to play tennis, and I have been taking singing lessons for a few month.
My question is why we use have been taking in the second portion of the sentence instead of using have taken and vice verse.
As per the book's explanation we using have been taking to focus on the activity and duration. In that case, why not we use present continuous tense in the first portion of the sentence?