"Do we think that four centuries have placed a clear distinction ahead of the forms of human literature?"
Here's a breakdown of the translation:
* Quarta seacula: Four centuries
* per humanitatis formas litterarum: through the forms of human literature
* anteposuerit: have placed ahead of (this is a perfect active third person plural subjunctive, suggesting a hypothetical situation)
* claram: a clear (feminine singular accusative, modifying "distinction")
* parum: little (meaning "not much" or "not significantly")
* putam(us): do we think (this is a first person plural present indicative of "putare," meaning "to think")
The sentence expresses uncertainty or doubt about the impact of time on the development of literature. It suggests that the difference between the forms of literature across four centuries is not as significant as some might think.