Condition

if
unless
I won’t be able to meet you, unless we schedule it in the morning.

whether
Whether you like it or not, this is the truth.

provided that
I can guarantee a good result, provided that you study.

so that
I can send you the documents so that you would have proof.

depending on
We can have a picnic this weekend, depending on the weather.

Summary

in conclusion
in summary
lastly
finally
to sum up
To sum up, I strongly support the efforts of our society to help the environment.

to conclude
to recapitulate
in short

Certainty

obviously
I was very disappointed, obviously because my expectations were too high.

certainly
I will certainly let her know your opinion.

plainly
You are plainly wrong

of course
undoubtedly
She is undoubtedly very beautiful