I have a bad habit of leaving ending sentences with prepositions. I'm inclined to write:
Two communities I'm working to contribute to
Is there a phrasing, and possibly a grammatical rule, that could help me out of this formulation?
Note:
I found this conversation helpful, though not applicable to this case.
Best Answer
The rule about ending sentences with prepositions is a bit of a dinosaur. It, along with the rule about not splitting infinitives, is an artifact left over from Latin, where such constructions are impossible.
Quite often, the reworking you have to do in order to avoid ending a sentence with a preposition makes the sentence even more unreadable. Example: "X and Y are two communities to which I am contributing" instead of "X and Y are two communities I am contributing to."
(The awkwardness of such constructions gives us the anecdote variously attributed to several people including the phrase, "This is the sort of thing up with which I shall not put.")
The ending prepositions you want to watch out for are the ones that can be completely removed without changing the meaning of the sentence. "Where is the library at?", for instance, can be just "Where is the library?"