作主语补语 I like this better than that
谓语主语补语 complemento predicativo del soggetto
主语补足语 Subject complement ; subjective complement ; She was found in tears
主语的补语 Subject Complement
主语与补语的一致 subject-complement concord
做主语的宾语补足语 preserved
主语+动词+补语 His eyes are blue
主语补足语的谓语 subject-object asymmetry
主语+系动词+补语 SVC
（主语补语） 石油被认为很有价值。
你的房间有我的两倍大。 double作主语补语。
本句是并列句，前一个分句中，“if”引导条件状语从句，主句主语“it”指代“the tradition of ambition”。 后一个分句中“who”引导一个定语从句修饰“people”，“the educated not least among them”是“people”的补语。
If the tradition of ambition is to have vitality, it must be widely shared; and it especially must be highly regarded by people who are themselves admired, the educated not least among them。
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