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530 singular and plural (8) : distributive plural
3 generalisations and rules
In generalizations and rules, singular and plural nouns are both possible.
We use a past participle in a perfect verb form. (OR We use past participles in perfect verb forms.)
All documents must be accompanied by a translation of the original.(OR All documents must be accompanied by translations of the originals.)
Mixtures of singular and plural are possible.
Subjects agree with their verb.
Children may resemble both their father and mother in different ways.
This often happens with fixed singular expressions like “at the beginning.”
Discourse markers usually come at the beginning of sentences.
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