S is the first letter of the word subject, which means "subject";

V is a verb, the first letter of a verb (in this case, a connecting verb). In English, the component behind the connecting verb is the predicate;

P is the first letter of the prediction word, which means "predication".

For example, I am a girl. I is the subject, am is the copulative verb, and a girl is the predicative part.

He does have some. He is a subject, a copula, and handsome is a predicative.

The above examples show that the predicative can be nouns, adjectives and so on.

Extended data:

Five basic types of English simple sentences;

1, S+V+P "subject+verb+predicate";

2.S+Vi (inherent verb) "Subject S+VI (intransitive verb)" means intransitive, the sentence itself is complete, and no elements are added after the intransitive verb;

3.S+Vt (transitive verb) +O (object) "subject+transitive verb+object" means transitive, and an object must be added after the transitive verb in English to complete the sentence;

4.S+VT (transitive verb) +O (object) +OC (object complement) "subject+transitive verb+object+object complement";

5. S+VT (transitive verb) +IO (indirect object) +DO (direct object)) "Subject+transitive verb+indirect object+direct object".