In writing, particularly writing dialogue or speech-like prose, it is custom to use the punctuation to indicate the tone of the speech.
As such, one often uses an exclamation point on a standard statement which would make it a statement made with an exclamatory tone, i.e. an exclamatory statement.
Now, what about an exclamation punctuated with a full stop? Instead of shouting
"Boy, was I wrong!", hands in the air
"Boy, was I wrong.", even-toned
or with an ellipsis
"Boy, was I wrong...", lowering your tone and shaking your head.
I have an inkling that all those are grammatically correct, but let's say I am writing an article, trying to engage my reader as if I would be talking directly to him. Are there cases where it would be frowned upon using something like that? Should I prefer using an exclamation point in every case, or try to reformulate the statement?
There seems to have some confusion on my intent. I don't want to sound exclamative, but the way I structure my sentence, with an interrogative word at the beginning and the sentence not being a question would point to the sentence being an exclamation, which by definition comes with an exclamation point. That's what prompted me to ask in the first place.