Correlative conjunctions work in pairs to relate one element in a sentence to another. They work in pairs such as ‘both/and’, ‘not only/but also’, and must be used in different places in a sentence for them to work. No commas are used unless the two elements being joined are independent clauses.

Below are some examples:

CORRELATIVE CONJUNCTIONS
As many/as-There are as many chairs as there are guests.
-We have as many plates as we need.
Barely/when-We had barely finished the match when it started to rain.
-I had barely opened my computer when the boss arrived.
Both/and-Emma liked both the location and the restaurant.
Both the father and the son are tall.
Between/and-Between travel and work he had a tiring schedule.
-It was difficult to choose between the peach tart and the strawberry pavlova.
Either/or-Tom usually either walks to work or takes his bicycle.
Either you stop making noise or you go to your room.
Hardly/when-The teacher had hardly begun to speak when he was interrupted.
-I had hardly started to show the graphs when the lights went off.
Neither/nor-Hugo was neither willing nor able to chair the meeting.
-He bought neither the red nor the blue jacket.
Not/but-The problem is not a lack of money but a lack of planning.
-It’s not a question of difficulty but a fear of making a mistake.
Not only/but also-Diana not only plays the piano but also sings.
Not only am I going to buy a dress but also shoes to match.
No sooner/thanNo sooner had I arrived than they all started to argue.
-The boy had no sooner started to explain than his mother got angry.
Rather/than-They’d rather go to the beach than play tennis.
-I’d rather live in the country than in the city.
Scarcely/when-We had scarcely started our meal when the phone rang.
-Tom had scarcely reached the intersection when the car broke down.
So/that-The girl was so weak that she could hardly lift her head.
-The road was so icy that it was dangerous to drive.
Such/that-It was such a cold day that we decided to stay indoors.
-He had such a headache that he couldn’t concentrate.
What with/and-What with her job and the children she doesn’t have much free time.
What with the virus and the bad weather we were confined indoors for weeks.
Whether/or-Jack didn’t know whether to call or to send a letter.
-You’ve got to go to school whether you like it or not.