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Fill in the blanks in the local coffee shop's new employee training manual.
As a general rule, if a customer _________________________ an espresso, we always _________________________ it with a small glass of sparkling water. However, if the espresso machine _________________________ down during the morning rush tomorrow, the manager _________________________ everyone free drip coffee instead to apologize for the delay.
The correct answers are orders, serve, breaks, and will give.
The first sentence describes a general rule or habit, so it uses the Zero Conditional (present simple + present simple).
The second sentence describes a specific, possible event in the future ("tomorrow"), so it requires the First Conditional (present simple + will + base verb).
In both cases, the "if" clause uses the present simple tense, but the main clauses change depending on whether it's a general fact or a specific future outcome!