Present Perfect simple vs. Present Perfect Progressive

Present perfect simple - Something happened in the past, but you don't know exactly when (it doesn't matter!!)

Present perfect progressive / continuous - Something started in the past and is still happening or you can see the effects.



YOUR DOUBT

IT = empty subject.

Ex. It is raining today.

It is six o'clock.



have been wondering

has got back

have never smoked

have been going to the gym

have been having AND have been eating

have also been drinking

have always wanted



STATIVE VERBS - NOT "ING"



EX. WANT, LIKE, HATE, ENJOY ETC.

KNOW

SENSES - SEE, TOUCH, LISTEN, SMELL