Gerundive: Try getting some rest.
Infinitive: Try to get some rest.
My textbook says that the former means "Attempt to get some rest" while the latter means to "try getting some rest as a possible solution to the problem".
They feel very familiar and I find them indistinguishable if I were to see them in a text.
Thus, I have the following questions:
- Can they be used interchangeably, or is one more grammatically correct than the other?
- If so, why does being gerundive or infinitive impart a different meaning to the two phrases?
- What grammatical functions do gerunds and infinitives play other than changing the function of a verb to a noun, adjective, or adverb?