86-It's expected that the eclipse won't be total. If it is total, the sky would will go dark
87- The boxer is weak. If he is were stronger, he'd win the game
88- If the volcano erupted had erupted yesterday, most people would have left their homes
89- Did you fail the exam ? – Definitely no not
90- If you like places off the beaten track , why don't (not) visit the Dakhla oasis