ALTHOUGH | THOUGH + non-finite clause – English Grammar Profiler

In the English Grammar Profile, C2 point 131 in CLAUSES/subordinated is defined as:

non-finite clauses after subordinating conjunctions ‘(although, though)’, to express contrast.

The EGP examples above, use Past Participles, but the definition above does not mention them as being critical to this as a C2 structure.

*The tagging might make mistakes between VVN and JJ = past participle and adjective for this point.

An iWeb search for:

though|although _VVN

1 ALTHOUGH BASED 907 2 THOUGH GIVEN 860 3 ALTHOUGH GIVEN 767 4 ALTHOUGH DESIGNED 731 5 ALTHOUGH CONSIDERED 680 6 THOUGH BASED 632 7 ALTHOUGH BORN 599 8 ALTHOUGH WRITTEN 508 9 THOUGH BORN 488 10 THOUGH MADE 483 11 ALTHOUGH LIMITED 478 12 ALTHOUGH KNOWN 474 13 ALTHOUGH MADE 410 14 ALTHOUGH USED 406 15 THOUGH WRITTEN 392 16 THOUGH LIMITED 382 17 THOUGH WED 346 18 THOUGH CONSIDERED 278 19 THOUGH KNOWN 272 20 THOUGH DESIGNED 258 21 ALTHOUGH INTENDED 251 22 ALTHOUGH SET 249 23 ALTHOUGH WED 248 24 ALTHOUGH BUILT 220 25 THOUGH COMPARED 213 26 ALTHOUGH LOCATED 203 27 THOUGH HED 188 28 ALTHOUGH CALLED 186

29 ALTHOUGH FOUND 184

31 THOUGH CALLED 167 32 ALTHOUGH AIMED 123 33 ALTHOUGH CREATED 118

B2 vocabulary: founded, granted, inspired, related, separated

*However this clause does refer to time.  It seems more like ellipsis:  ‘Although it was discovered only in 1988‘