Conjunction

Conjunctions are LRUs that connect two other LRUs, phrases or clauses.

Natural Language

In the UNL^arium framework, conjunctions are classified as follows

• coordinating conjunctions (COO) join two or more items of equal syntactic importance ("and", "or", "but");
  • correlative conjunctions (CRC) are pairs of conjunctions that work together to coordinate two items (both … and, (n)either … (n)or, not (only) … but (also)....);
• subordinating conjunctions (SCJ) introduce a dependent clause. They are further classified in:
  • Complementizers (CMR) are special subordinating conjunctions that introduce complement clauses ("that" in "I know that he came");
  • Adverbializers (AVR) are special subordinating conjunctions that introduce adverbial clauses ("after" in "I go after you go");
  • Relativizers (RVZ) are special subordinating conjunctions that introduce relative clauses.

UNL

In UNL, conjunctions are explicitly represented by attributes, except in case of complementizers ("if", "that", "whether") or when their semantic value may be inferred from the corresponding relation.

Conjunction attributes

* indicates optional representation

Attribute	Value	English	UNL
@after	after	The books will be sent to the library after I have read them.	tim(send, read.@after)
@although	although, even though, though	Although they have arrived early they could not enter.	seq(enter, arrive.@although)
@and*	and, nor, as well as, both... and, neither... nor, not only... but also	He sold an apartment and bought a country-house.	and(buy, sell.@and) or and(buy, sell)
@as*	as	The situation is not so bad as you suggest.	man(bad, suggest.@as) or man(bad, suggest)
@as.@if	as if, as though	He gives orders as if he were the master of the house.	man(give, master.@as.@if)
@because*	because, since, for, as, that	He said he cannot go because he is very busy.	rsn(go, busy.@because) or rsn(go, busy)
@before	before	Look before you leap.	tim(look, leap.@before)
@but	but, yet	He is young but sensible.	and(sensible.@but, young)
@even.@if	even if	I intend to go even if it rains.	con(go, rain.@even.@if) or con(go, rain.@even)
@except.@if	except if	I intend to go except if it rains.	con(go, rain.@except.@if) or(go, rain.@except)
@if*	if	If you promise to come, I will wait for you.	con(wait, promise.@if) or con(wait, promise)
@if.@only	only if	Only if you promise to come, I will wait for you.	con(wait, promise.@if.@only) or con(wait, promise.@only)
@in_case	in case (that)	He wears two watches in case one of them stops.	rsn(wear, stop.@in_case)
@or*	or, either... or, whether... or	You must prove that you are right or apologize	or(apologize.@or, prove) or or(apologize, prove)
@since*	since	What have you been doign since I last say you?	tmf(do, say.@since) or tmf(do, say)
@so*	so, then, so that, that	We are late for the train, so we must take a taxi.	seq(take, late.@so) or seq(take, late)
@unless	unless	I shall go unless it rains.	con(go, rain.@unless)
@until*	until, till	Wait until the day breaks.	tmt(wait, break.@until) or tmt(wait, break)
@when*	when, as	When I arrive I will write.	tim(write, arrive.@when) or tim(write, arrive)
@whereas*	whereas, while	You didn`t work yesterday, whereas he worked till midnight.	coo(work, work.@whereas) or coo(work, work)
@while*	while	Remain standing while they sing.	dur(stand, sing.@while) or dur(stand, sing)

Lists of conjunctions

• English conjunctions