What is the predicate in this sentence gentle rain began to fall?

The predicate in the sentence "Gentle rain began to fall" is began to fall.

Here's why:

* Subject: The subject of the sentence is "Gentle rain". This is what the sentence is about.

* Predicate: The predicate tells us something about the subject. In this case, it tells us what the gentle rain did: it began to fall.

The predicate always includes the verb and any other words that modify or complete the verb.