Should you ______ any technical anomalies during the system upgrade, notify the network administrator immediately.

Answer and explanation

Correct answer: A. encounter

  1. Step 1: In an inverted first conditional beginning with 'Should', the auxiliary precedes the subject and governs a bare infinitive. 'Should you encounter' functions as the formal conditional equivalent of 'If you should encounter'. Answer: encounter. Why not the others: "encountered" uses past inflection which violates the bare infinitive requirement following modal auxiliary 'should'; "have encountered" uses perfect infinitive which implies completed past condition rather than prospective future contingency; "will encounter" inappropriately inserts future modal 'will' inside an already auxiliary-governed conditional.

Practise more Advanced Inversion and Subjunctive Mood.

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