Do you use the article as the subject before the adjective and the singular or plural as the predicate The plural is used to denote a class of people Singular number for a class of things Right? A few examples

Do you use the article as the subject before the adjective and the singular or plural as the predicate The plural is used to denote a class of people Singular number for a class of things Right? A few examples

1. The poor are well taken care of in that country