[idlovecountryside]

I am native Japanese.

I have been worried about it.

I am studying English.
I have studied English.
I have been studying English.

If I translate them into Japanese by books
all "　私は英語を勉強しています　”

I think it is same the progressive form and the present perfect tense in Japanese.

And maybe the past progressive form and the past presetnt perfect tense are same.