Sentence structure and word order 6
Specific types of subordinate clauses 4
Om + te + infinitive 2
Order and position of other elements in the clause 2
Counterfactual with zou(den)
To say the reverse of what is actually the case, in Dutch you can use zou(den) + infinitive:
In the first example, the speaker notes the fact that the shopping has not been done and indicates that the adressee (jij) was supposed to have done that. In the second example, the speaker also implies that the shopping has not been done, and implies that Karin and Simone were supposed to have done the shopping.
Note that zou here expresses uncertainty about a situation. This is also used to express gossip or hearsay, which is not counterfactual per se.