Question

We use “should have” to express…
a) things we have to do
b) regrets about a past action
c) future events
d) deductions based on past events

Answer 1

c) Future events.

Explicación:

Porque "should have" significa "debería tener" y "debería es futuro" y "Future events" lleva "Future" y eso (Future) significa futuro.