Select the most appropriate option to improve the bold part of the sentence.
He behaves as if he knows everything.
Show answer & explanation
Correct answer: B
Explanation
In English grammar, when using the conjunctions 'as if' or 'as though' to describe a situation that is contrary to reality (hypothetical), we use the Past Subjunctive (simple past tense).
Sentence: 'He behaves as if he knew everything.'