Present perfect continuous tense

Structure of present perfect continuous
positive question negative
I have (I've) been living here for two years.
He has (he's) been waiting for you.
Have you been living here for a long time?
What has she been doing?
I have not (haven't) been waiting for long.
He has not (hasn't) been working.

Present perfect continuous - common mistakes
Common mistakes Correct version Why?
It has been rain heavily all day. It has been raining heavily all day. The structure of the present perfect continuous is have/has been -ing.
I have sat here for two hours. I have been sitting here for two hours. Verbs such as sit, wait, speak, etc. (non-stative verbs) suggest continuity and so are mostly used in the continuous (-ing) form.
I have worked here for five years.
I have been working here for five years.
When BOTH the simple and continuous forms are possible, native speakers prefer to use the continuous.