Either....or
Either you tell me the truth, or you will be sorry
Neither....nor
She can neither read nor write
But....also
Not only did he washed the dishes, but he also scrubbed the floor
Both....and
They like both singing and dancing
Not only
He not only washed the dishes , but he also scrubbed the floor
Besides
John is very unpunctual ;besides. the often falls asleep in class
you have to get proper rest ; furthermore, you will get sick