Element FORM/USE: SUBORDINATING CONJUNCTIONS, CONDITIONS
SuperCat CLAUSES
SubCat conditional
Lexical Range N/A
Level B2
Cando Can use conditional subordinate clauses with a range of conjunctions ('as long as', 'provided') + present simple or present continuous, with future reference.
Corrected Learner Example As long as it involves children I'd be delighted to work for you during the summer. (Denmark; B2 VANTAGE; 1998; Danish; Pass)

If you're really eager to learn age doesn't really matter as long as you're willing to learn. (B2 VANTAGE; 2009; Tagalog; Pass)

My client will most certainly ask for compensation covering all losses incurred, unless you manage to find out where the goods are. (Germany; B2 VANTAGE; 2008; German; Pass)

Finally, I am pleased to inform you that we would like to offer a 10% discount provided you reserve office space for eighteen months. (China; B2 VANTAGE; 2002; Chinese; Fail)

Providing we implement the suggested actions I believe we can increase sales within the next six months, overcoming the current situation caused by the international situation. (Portugal; B2 VANTAGE; 2009; Portuguese; Fail)

I would suggest that you might bring a city map in case you lose your way. (Japan; B2 VANTAGE; 1993; Japanese; Pass)
Uncorrected Learner Example
Comments While 'unless' is a B1 lexical item in the EVP and taught at B1, its conditional use is not established until B2. Note also that unless is very error prone at B1.
Note on punctuation: many grammar books stress that when the if clause precedes the main clause, it must use a comma. We cannot establish a consistent competency for this (and punctuation in general). It seems too idiosyncratic. L1 can be a skewing factor.

Cambridge University Press