There are quite a a lot of situations like this. But here I'll use just two examples.
The first one is with the word since. We can say: There have been a lot of flies since the street sweeper was put out of job, or There have been a lot of flies since the putting out of job of the street sweeper. For the former there is a complete sentence after since, but for the latter the part after since is technically a noun phrase. I know both would be okay to use depending on what part of speech is since, but which one is preferred?
Another case is with the word that for add-ons. We could say The thing that we see is falling off is not stationary. It should be also correct to say The thing that we see falling off is not stationary. But which would be the choice of preference?