(First conditional) If we __________________ (not / work) harder, we __________________ (not pass) the exam
If we don't work harder, we won't pass the exam.
(Third conditional) If the students __________________ (not be) late for the exam, they __________________ (pass).
If the students hadn't been late for the exam, they would have passed.
(Third Conditional) If the weather __________________ (not be) so cold, we __________________ (go) to the beach.
If the weather hadn't been so cold, we would have gone to the beach.