For this purpose, there is more than one solution, as seen more often in programming. To solve an issue like this, think about how you would do it yourself. How can you tell words apart from each other ? I would think that is the space between the words. So logically, the solution lies not in breaking up the sentence into words, but into finding the spaces in the sentence. Perhaps you could use this code as a base:
It breaks down the sentence into single characters.
Open in online IDEt$ = "this is a sentence" For i = 1 to len(t$) char$ = Mid$(t$, i, 1) Print char$ Next
It breaks down the sentence into single characters.