Gerund, infinitive, participle

[mrlocom]

For the following sentences, which are gerunds, infinitives, present participles and past participles?

The ringing of the church bells was heard above the shouting of the surging crowd.

Being a junior accountant working for a small company, I may well have little prospect of promotion this year due to the recent falling-away of business.

Thanks!

 

[Tdol]

First of all, what do you think they are and why? It will help you understand the differences better if you try first.