GRE長難句7大必會難點4—名詞性從句的虛擬語氣
尖劍定要命
insist, recommend, must, require, command
S+ V+ O [ that+ O+ (should) V ]
*O in "that" noun clause tends to be substituted by pronouns
*In this context, odds are that "should" doesn't appear in the noun clause, leaving the verb regular in the sentence
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