Giving examples: for example, for instance, such as, as can be seen, as is shown by, in the first place, more importantly, in addition to this, furthermore
Cause and effects: so, as a result of, because, due to the fact that, this caused, this led to, therefore, despite the fact that, never the less
Comparison: similary, compared with, in the same way, equally
Summing up: in conclusion, to sum up, to conclude, overall, on the whole
Changing topic: with regard to, now, to consider, by contrast, asfar as… Is concerned…
Contrasting: however, on the other hand, despite this, in contrast, whereas, instead