Make sure there are two parts to the sentence when your sentence begins with any of these words:
Incorrect: Although the research was completed.
This is called a fragmented sentence because it does not express a complete thought….you are left asking, ‘although the research was completed….what’s next?’ To fix this sentence you need to add a comma and then add the rest of the sentence.
Correct: Although the research was completed, the results have yet to be published.