Correlative conjunctions

Common correlative conjunctions:

Correlative construction	Category / construction type	Example	Basic function / force
as … as	comparative construction	She is as capable as her colleague.	equal degree
as many/much … as	comparative construction	We need as much evidence as possible.	equal quantity
both … and	coordination	Both the manager and the developer agreed.	addition
either … or	coordination	Either we leave now or we miss the train.	alternative
hardly … when	negative-inversion construction	Hardly had he arrived when the meeting began.	immediate succession
if … then	conditional construction	If the evidence is reliable, then the conclusion follows.	condition → consequence
just as … so (too)	comparative/correlative construction	Just as demand increased, so too did prices.	parallel correspondence
neither … nor	coordination	Neither the manager nor the developer agreed.	negative addition
no sooner … than	negative-inversion construction	No sooner had he arrived than he left.	immediate succession
not only … but also	coordination	She is not only intelligent but also practical.	emphatic addition
rather … than	comparative/preference construction	I would rather stay than leave.	preference
scarcely … when	negative-inversion construction	Scarcely had he arrived when the meeting began.	immediate succession
so … that	degree construction	The problem was so difficult that we gave up.	degree → consequence
such … that	degree construction	It was such a difficult problem that we gave up.	degree → consequence
the less … the less	comparative correlative	The less you practise, the less confident you become.	proportional relation
the less … the more	comparative correlative	The less you worry, the more clearly you think.	inverse proportional relation
the more … the less	comparative correlative	The more you rush, the less accurately you work.	inverse proportional relation
the more … the more	comparative correlative	The more you practise, the more confident you become.	proportional relation
whether … or	interrogative/content-clause construction	Whether he agrees or refuses, we’ll proceed.	alternatives
whether … or not	interrogative/content-clause construction	Whether he agrees or not, we’ll proceed.	alternatives / irrelevance

Note

Conjunction as a broader term, not a CGEL category