There is no present participle of the word unable because the word implies no action. The present participle of enable would be enabling, as in "He has been enabling her shopping".
The past participle of "choke", which means to be unable to breathe, is "choked". The present is "choking", and the third person singular is "chokes".
Being is the present participle. The past participle is been.
present participle
Presenting is the present participle of present.
Presenting is the present participle of present.
No, "have been" is not a present participle. It is the present perfect tense of be. Being is the present participle of be.
The present progressive: am/is/are + present participle. The present perfect progressive: have/has + been + present participle. The past progressive: was/were + present participle. The past perfect progressive: had + been + present participle. The future progressive: will + be + present participle. The future perfect progressive: will + have + been + present participle.
No the present participle is having.
Being is the present participle of be.
The present participle is doing.
Getting is the present participle of get.
Slitting is the present participle of slit.