Predicate of main family table structure

Predicate: Predicate is used to modify the subject, indicating the identity, nature, character, characteristics and state of the subject. Predicate is located after copula and closely related to copula. If there is a copula, there is a predicate, and if there is a predicate, there is a copula.

It usually consists of nouns, adjectives, adverbs, prepositional phrases, infinitives, verbs and clauses. If the predicate of a sentence is also acted by a sentence, then the sentence that acts as a predicate is called a predicate clause, and the predicate is a sentence component that plays an expressive role.

For example:

I'm fine. (fine is an adjective, used as a predicative)

He is a boy. (Boy is a noun, used as a predicative)

Five plus two equals seven. (seven is a number, as a predicative)

We are here. (here is an adverb, as a predication)

He is not at home. At home is a prepositional phrase used as a predicative.

The difference between infinitive and participle as predicative

Infinitive and gerund as predicative are equivalent to a noun as predicative, which means to answer the subject "what is it"; A participle as a predicative is equivalent to an adjective as a predicative, meaning to answer the subject "how".

This beautiful village is still unknown to the world. ?

This beautiful village is still unknown to the outside world. (Subject and predicative are not equal)

The difference between infinitive and gerund as predicative

Although infinitive and gerund are both used as predicative to answer the question "What is it", there are still some differences between them. The infinitive as a predicative emphasizes concrete, imminent and one-off actions; Gerund as predicative emphasizes abstract, frequent and general actions.

His job is to paint the walls.

His job is to paint these walls.