The Infinitive and the ing-form as Object in a Sentence Pattern with it as a Formal Subject

§ 1. We usually find the infinitive as an object of a verb or adjective in a sentence pattern with it as a formal subject.

e.g. It annoyed me to hear him tell a lie.

The ing-form can also be found as an object of an adjective in a sentence pattern with it as a formal subject in spoken English where it adds emotional colouring to the sentence.

e.g. Well, it isn't easy telling you all this.

It will be great having them at the party.

However, only the ing-form is used after the expressions to be worth and to come to.

e.g. If it came to losing him, would she suffer? It wasn't worth talking to him about it.