In English, Greek, and Hebrew a subject must agree with its verb in gender and number. A plural verb requires a plural subject.
Greek:
See principle 7.
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Hebrew:
A subject must agree with its verb in number. video
An attributive adjective must agree with whatever it is modifying in gender , number, and definiteness.
A predicate adjective precedes the noun it modifies. It must agree with this noun in gender , number, but not definiteness.