Actually, I think this is not a passive form. The passive form is a sentence wherein the doer of the action does not necessarily have to be present for it to be a complete sentence, and the receiver of the action becomes the subject. Example: I will be writing the letter. --- Active form; the doer is present in the sentence. The letter will be written (by me.) --- Passive form; 'by me' does not have to be there, although it can be put there. If you want to make it passive, then it will be "Paying off the business will be finished in two years." (by us) Because the noun clause "paying off the business" is the receiver of the action, it became the subject in passive form. Hope it helped. :)

The word "finished" in this sentence is a verbal - participle functioning as an adjective modifying "we." The word "be" which is before the word "finished" is an auxiliary verb. I hope this helps.

Yes the sentence is in passive form. It can be used actively as well, but i think the mood and the tenses do play a part in this sentence.

hi MOD me too i want to meet new friends... i could contact you in skype... send to me your contacts... i'm in ITALY right now... add me soon as possible ! You'll find new people too !!!

Good question - it certainly looks like it could be passive! However, this is not the passive form. The passive form of this sentence would be: The business will be paid off by us in two years. Note how in this case the emphasis of the action of paying off is no longer placed on the speaker us/we but rather on the business.