Carla was talking in a low whisper to her best friend.

I think that there is not a gerund.
Carla noun
was talking verb
and the rest are both prep phrases

Right! You've got it! :-)

Carla is a noun, and it's used as the subject of this sentence.

Actually, in the sentence "Carla was talking in a low whisper to her best friend," the gerund is "talking." A gerund is a verb form ending in "-ing" that functions as a noun. In this case, "talking" is the action that Carla is performing. So, the step-by-step breakdown of the sentence is:

1. Carla - noun (the subject of the sentence)
2. was talking - verb (the action Carla was performing)
3. in a low whisper - prepositional phrase (describing how Carla was talking)
4. to her best friend - prepositional phrase (describing who Carla was talking to)

Actually, in the sentence "Carla was talking in a low whisper to her best friend," the gerund is the word "talking." A gerund is a verb that functions as a noun and ends in -ing.

To identify the gerund in this sentence, look for the verb that is being used as a noun. In this case, the verb "talking" is functioning as the action that Carla is performing. So, "talking" is a gerund in this sentence.

It's important to note that the other words mentioned, such as "Carla" (noun), "was" (verb), and the phrases, are not gerunds. They serve different grammatical functions in the sentence.