修饰性短语就是一组修饰性的词，没有主语也没有谓语。
A phrase is a modifying group of words that contains neither a subject nor a verd.
性质形容词单独做谓语时，一般用在问答、比较等场合或带上“了”字，包含有一定的比较性特征。
When a character adjective is used as a predicate, it is generally on the occasions of contrast, questions and answers, etc, and it has comparative characteristics.
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