Learn Spanish (Latin America): El cirujano se pone nervioso si la anestesia no funciona. - The surgeon gets nervous if the anesthesia does not work.

The verb poner normally means "to put" or "to place." However, when used as the pronominal verb ponerse (with a reflexive pronoun like se), its meaning changes to "to become" or "to get." You will frequently see ponerse used with adjectives to talk about temporary changes in physical or emotional states. Here, se pone nervioso means "he gets nervous."

Why use funciona for "work" instead of trabaja?

In Spanish, trabajar is strictly used for physical or mental labor, like a person working at a job. When you want to say that a machine, system, or medicine (like la anestesia) operates correctly or has the desired effect, you must use funcionar.

Why is funciona in the regular present tense (indicative) here instead of the subjunctive?

When an "if" clause (si) describes a real, likely, or habitual situation—like stating the general fact that this surgeon gets nervous whenever the anesthesia fails—it takes the regular present indicative tense. You only use the subjunctive after si for highly unlikely or impossible hypothetical scenarios (like "If I were the surgeon...").

If the surgeon were female, what would change in this sentence?