I was wondering if any native speaker uses the following type of conditional sentence:
If my mother-in-law was coming tomorrow, I would have spent all day cleaning the house.
The sentence appears in Conditionals: A Comprehensive Empirical Analysis, by Renaat Declerck, Susan Reed (2001). The book says the sentence is counterfactual.
([Link to sentence in book] (https://books.google.com/books?id=RtyewWWe1LAC&pg=PA44&lpg=PA44&dq="If+my+mother-in-law+was+coming++tomorrow,+I+would+have+spent+all+day+cleaning+the+house"))