wide range of subordinating clauses & conjunctions – English Grammar Profiler
In the pie above, the frequencies of the subordinating conjunctions tagged in the iWeb corpus are proportionally compared only to one another. I believe it would come as a surprise to many experienced ESL teachers that ‘once’ is more common than ‘unless’ which I am quite sure most teachers have taught alongside ‘if’ for higher levels.
Point 85 (B2) in the category of CLAUSES is defined in the English Grammar Profile as
“a finite subordinate clause, before or after a main clause, with conjunctions to introduce conditions”
This is a partially overlapping point with point 18 (B2) in CONJUNCTIONS defined as a
“wide range of simple subordinating conjunctions (‘once, whereas, unless, except (that) provided (that)‘), to introduce a subordinate clause.”
Notice the clash with the EVP:

Also, when we look at the example sentences for point 85, we see that these revolve around two conjunctions (‘unless’ & ‘provided’). Our bigger problem of clashing levels is for ‘unless’.
Unless_CS something_PN1 is_VBZ done_VDN many people will die .
Getting to work by car is comfortable and faster unless_CS you_PPY are_VBR caught_VVN in a traffic jam.
The only examples from the EGP above are present simple passive. (From these we could use unless_cs _p _vb _v?n* to search iWeb)

The situation gets more confusing in that Point 57 in the category of CLAUSES is B1 and defined as
‘unless’ + present simple to talk about an exception, with present and future reference.
Here the key formal difference to differentiate level is that there must be present simple following the conjunction ‘unless’ which becomes very hard to find indeed.
Finally, the greatest confusion is created when we see the example for B2 point 18 in the English Grammar Profile:
Unless_CS the_AT situation_NN1 improves_VVZ , we will be forced to try a new supplier .
This is present simple! So should it be B1? or because it is third-person singular (a much harder construction!) be B2?
Hence we will copy the code above Unless_cs _a _n _vvz to see what we get in iWeb:

Just from looking at the high level of vocabulary, we might lean on the B2 side for complexity here regardless.
‘Unless’ (by itself) can also be examined further for collocates in the iWeb corpus and through text inspector to see just how academic a context and higher-level vocabulary surrounds it:

Before we accept all of this vocabulary for our examples, we need to remember that this point at B2 is for finite clauses so here is a recap (but do not believe the examples of the non-finite):

What we notice from most of our collocates is that there are many past participles. This does not mean that these words are bad at all, actually using them would show that the writing is actually more complex than B2. We just need to keep in mind to look for more simple clauses with a subject-verb that is learnt at lower levels.
‘Unless’
1 OTHERWISE (RR ) 81484
Non-finite

2 SPECIFICALLY (RR ) 16572
Non-finite

3 STATED (VVN_VVD ) 12705 (as above)
4 NOTED (VVN_VVD ) 10154
Non-finite

5 ABSOLUTELY (RR ) 9081
Most are non-finite with ‘unless absolutely necessary’.

6 SPECIFIED (VVN_VVD ) 7859
Most are non-finite as ‘unless specified otherwise.’

7 STATED (VVN ) 6037 (as above) 8 EXPRESSLY (RR ) 5930 (unlisted) 9 SPECIFIED (VVN ) 5789 (as above)
10 PERMISSION B1 5050
11 INDICATED (VVN_VVD ) 4908 12 EXPLICITLY (RR ) 4734 13 REQUESTED (VVN ) 4116 14 AUTHORIZED (VVN ) 3410 15 PERMITTED (VVN ) 2792 16 CONSENT (NN1 ) 2730 17 ACCOMPANIED (VVN ) 2479 18 ARRANGEMENTS (NN2 ) 2436 19 USELESS (JJ ) 2253 20 PROHIBITED (VVN ) 2232 21 INSTRUCTED (VVN ) 1951 22 DETERMINES (VVZ ) 1505 23 DECIDES (VVZ ) 1478 24 AGREES (VVZ ) 1444 25 INTEND (VV0 ) 1417 26 FAULTY (JJ ) 1282 27 EXEMPTION (NN1 ) 1098 28 EXEMPTED (VVN ) 1083 29 EXEMPT (JJ ) 1081 30 MISTAKEN (JJ_VVN ) 1080 31 HEREIN (RR ) 1067 32 TERMINATED (VVN ) 938 33 WAIVER (NN1 ) 932 34 DEFECTIVE (JJ ) 897 35 CHOOSES (VVZ ) 844 36 SPECIFIES (VVZ ) 828 37 MEANINGLESS (JJ ) 805 38 INSTRUCTED (VVN_VVD ) 706 39 VOLUNTARILY (RR ) 695 40 DRASTIC (JJ ) 670 58803 41 DIRECTS (VVZ ) 636 42 NON-REFUNDABLE (JJ ) 634 43 REPENT (VV0 ) 613 44 MEDICALLY (RR ) 600 45 OVERRIDDEN (VVN ) 587 46 AUTHORISED (VVN ) 586 47 WORTHLESS (JJ ) 581 48 POINTLESS (JJ ) 556 49 WAIVED (VVN ) 57 50 PROVOKED (VVN ) 418
B2 unless + present simple passive
Our iWeb corpus search: unless_cs _p _vb _v?n*
1 UNLESS YOU ARE PREPARED 768 (notice that the tagger is not sure if this is an adjective or past particle)
2 UNLESS SOMETHING IS DONE 440

20 UNLESS YOU ARE ASKED 113
B1 ‘unless’ + present simple lexical verb
unless_cs _p _vv
1 UNLESS YOU WANT 23336
2 UNLESS YOU KNOW 10806
3 UNLESS YOU GET 5790

20 UNLESS YOU GIVE 1632
Unless + a n vvz (B1 or B2???)
1 UNLESS THE CONTEXT REQUIRES 486
Americas Gold and Silver Announces C$25 Million Bought …
All references to the Company include its subsidiaries unless the context requires otherwise. (otherwise is B2 adverb modification already.)
2 UNLESS YOUR DOCTOR TELLS 414

20 UNLESS THE COURT MAKES 51
‘Provided‘
1 FURTHER (RRR ) 13961
This collocates but most samples don’t appear in conditional clauses when checked on Google News, therefore a look at iWeb specifically for ‘provided_cs’ = that as a conjunction is further inspected. We cannot be sure since even the tagger is unsure.
This is an example where I counter check claws7:
I_PPIS1 provided_VVD you_PPY with_IW the_AT paper_NN1 ._. Good this is B1 past tense. I_PPIS1 provided_CS21 that_CS22 yesterday_RT ._. (the tagger incorrectly assumes 'provided that' is a two-part subordinating conjunction)
Manually inspecting this shows that half are still not conditionals. The green lines of this set of 20 probably are conditional.
2 EVIDENCE (NN1 ) 2678 3 FUNDS (NN2 ) 2590 4 ASSISTANCE (NN1 ) 1603 5 SUFFICIENT (JJ ) 1189 6 EXPENDED (VVN ) 1036 7 GUIDANCE (NN1 ) 1015 8 INSIGHT (NN1 ) 1002 9 MEETS (VVZ ) 878 10 TOWELS (NN2 ) 875
So collocates are not the way to inspect this. What we notice though from the above ‘green’ is that we can be more sure to find the conditional structure next to a comma or full stop.
So a new search for: , provided_cs * * is carried out and gives us:
1 , PROVIDED THAT THE 9991
When we further check this for collocates 4 to the left and right, we start to get a real picture of the type of language located around this conditional:
1 PARTY 215 (this is not a birthday ‘party’)
2 SHALL 213
3 PERSON 212

20 NON-COMMERCIAL 49
2 , PROVIDED THAT YOU 2865

20 , PROVIDED THAT THERE 448
‘Once’
. once_cs * * * * *
1 . ONCE YOU GET THE HANG OF 1014 (idiom!)
2 . ONCE YOU ‘VE DONE THAT , 884

7 . ONCE YOU ARE HAPPY WITH THE 324

10 . ONCE YOUR HAIR IS DRY , 290

20 . ONCE YOU ARE DONE WITH THE 176
. once_cs * _vv
1 . ONCE YOU GET 19614

20 . ONCE YOU HIT 1588
‘except’
When we check the following Ngrams on iWeb, there is no doubt just how extremely formal this conjunction is and in particular it appears to be found in a great deal of law terminology. The other thing to note is ‘as’ and ‘provided’ are also located here. Also, many of the following are prepositional phrases:
except_cs * * * *
1 EXCEPT IN THE CASE OF 4705
2 EXCEPT AS OTHERWISE PROVIDED IN 3563 3 EXCEPT , OF COURSE , 2209 4 EXCEPT TO THE EXTENT THAT 1856 5 EXCEPT AS REQUIRED BY LAW 1585
6 EXCEPT AS PROVIDED IN SUBSECTION 1345
7 EXCEPT AS PROVIDED IN PARAGRAPH 1131
8 EXCEPT AS PROVIDED IN THIS 1054 9 EXCEPT WHERE PROHIBITED BY LAW 940
10 EXCEPT AS PROVIDED IN SECTION 937
11 EXCEPT WHEN IT COMES TO 842
12 EXCEPT AS OTHERWISE PROVIDED BY 757
13 EXCEPT AS SET FORTH IN 713 14 EXCEPT IN SO FAR AS 572 15 EXCEPT AS REQUIRED BY APPLICABLE 541 16 EXCEPT AS MAY BE REQUIRED 526
17 EXCEPT AS PROVIDED IN ORS 507
18 EXCEPT AS EXPRESSLY PROVIDED IN 484
19 EXCEPT AS PROVIDED IN THE 477
20 EXCEPT AS EXPRESSLY SET FORTH 430
So to attempt to find simple clauses we can try searching:
except_cs _p _v
1 EXCEPT IT ‘S 2523

10 EXCEPT YOU CAN 737
1 EXCEPT THAT IT IS 2318 2 EXCEPT THAT IT ‘S 1175
3 EXCEPT THAT IT WAS 1086 4 EXCEPT THAT THEY ARE 1019
5 EXCEPT THAT IT HAS 904
‘whereas’
whereas_cs * *
1 WHEREAS , THE 5987
2 WHEREAS IN THE 5875 3 WHEREAS THE OTHER 2338 4 WHEREAS IF YOU 2317 5 WHEREAS IT IS 1830 6 WHEREAS , IN 1758
7 WHEREAS THE LATTER 1123

20 WHEREAS THOSE WHO 601











