Verified answer

Listing points: First / firstly, second / secondly, third / thirdly, First of all, For a start, To begin/start with,

In addition, further, moreover

Introducing examples/justifications: for example, as an example, for instance

Showing contrast:  Even though, however, despite, although, on the contrary, on the other hand, otherwise, alternatively

Introducing a conclusion: In conclusion, to summarise, finally, To conclude, As we have seen, therefore

Giving your opinion: In my opinion, in my own view, to my mind, as far as I know, to my way of thinking