Hi everyone! It is the 100th time I come across this problem and, finally, I have decided to post it to this great forum hoping to get an answer. I usually write technical reports, texts, etc. Sometimes I want to express an idea with a verb which is "married" to a preposition (i.e. when thinking about that verb your mind always brings it with that preposition) but if that verb does not come with any object, I am not sure if i should write the preposition or not. For example: Mobility decisions must depend on the type of data we are dealing (with??). Should the preoposition "with" be included in this sentence? Is it a rule of thumb or it just works in that sentence (I can't remember any other sentence now... agghh)?