No desviemos la ruta en caso de que falle el sistema cronológico.

Questions & Answers about No desviemos la ruta en caso de que falle el sistema cronológico.

Why is falle in the subjunctive here instead of the indicative falla?
The phrase en caso de que (in case) always triggers the subjunctive. It introduces a contingency or a hypothetical situation that might happen in the future, so we must use the subjunctive falle instead of the indicative.
What verb form is desviemos, and why is it used here?
It is the negative nosotros command (imperative) for desviar (to divert). To say 'let's not' do something in Spanish, you use the first-person plural form of the present subjunctive. Since desviar is an -ar verb, it takes the -emos ending.
Why does the verb falle come before its subject el sistema cronológico?
In Spanish dependent clauses, it is very natural to invert the subject and verb, placing the verb first. This is especially common with verbs like fallar when they introduce a new piece of information or when the subject is a bit long.
Could I say en caso de fallar instead of using que and the subjunctive?
Unlike English, Spanish rarely uses an infinitive directly after en caso de. You either have to use a noun, like en caso de una falla (in case of a failure), or use en caso de que followed by a conjugated subjunctive verb, as seen in this sentence.

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