I have spent quite a lot of time to understand and correctly use the confusing words, whoever and whomever. What I have learned so far through various materials, StackExchange was especially helpful, is that we use whoever when the structure of a sentence seems to be nominative(he) and whomever when the structure of a sentence seems to be accusative(him).
Sometimes, there would be structures like both nominative and accusative are meant. I think these structures are called "fused relative," and in this case, we would have "free choice."
I'd appreciate if you could tell me whether my understanding of this issue is right or not.
Now, please take a look at the sentence below.
Latex Technologies is offering free trial versions of its new database to ________ has a current subscription.
The only options to fit in the blank are whoever and whomever. Is this what a fused relative look like? Therefore, I have the free choice? Or, is there a certain evidence that makes to choose one of the two?