then, first, at once, next, after that, previously, while, when, the following day, etc.
firstly, in the first place, secondly, thirdly, my next point is, last/finally, etc.
for example/ for instance, to illustrate, an example/ instance of this is, let’s take….., take…. for example, etc.
in other words, that is to say, to put it another way, let me put it this way, or rather, namely, etc.
in this respect, in that connection, as we said, apart from this, etc.
to resume, to return to the previous point, getting back to the argument, etc.
to sum up, in short, it amounts to this, what I have been saying is this, etc.
it is worth noting, I would like to direct your attention to, let us consider, we must now turn to, I shall begin by, etc.