Additive transitions are used to add information to a piece as well as introduce an idea, reference a previously stated point, clarify a concept or show similarity to another idea. Examples of these phrases include as well as, furthermore, for instance, likewise, namely, in other words, actually and on the other hand. These transitions can be used to introduce new concepts in your short story or restate and show similarities in one already stated.
Adversative transitions are used to communicate conflict, contradiction, concession and dismissal in your short story. Examples of this type of transition include but, however, in contrast, while, even more, indeed, above all, more importantly, be that as it may, despite, granted, although, nonetheless, either way, at any rate, at least, rather and instead. These transitions can be used in your short story to tell conflicting sides of the same event.
Causal transitions are used to show cause and effect relationships in your short story. Examples of these include because, being that, seeing that, since, in the event that, providing that, only if, as a consequence, therefore, accordingly, for the purpose of, in order to, with this in mind, under those circumstances and otherwise. These transitions can be used in your short story to explain the effect of something that happens and the purpose behind it.
Sequential transitions are the most common and are used to indicate a chronological or logical sequence of events. Examples of these transitions include initially, at first, to start with, subsequently, eventually, next, afterward, by the way, given these points, to put it briefly and as I have said. These transitions can be used in your short story to show a passage of time as well as summarize key ideas in your story.