Questions & Answers about Marco inventa una soluzione.
In Italian, subject pronouns are often left out because the verb ending already shows who the subject is.
- invento = I invent
- inventi = you invent
- inventa = he/she invents
So Marco inventa is completely natural, and Marco already tells you who the subject is.
You could say lui inventa, but that would usually add emphasis, such as contrast:
Inventa is the third person singular present tense of inventare.
That means it can mean:
- he invents
- she invents
- it invents
- and in many contexts, also is inventing or does invent, depending on English translation
With Marco, it means Marco invents / comes up with.