subject is the part of a sentence that interacts directly with the verb (with rare exceptions), according to the parsing. In short, it consists of the syntactic function of what the rest of the clause refers to.
Usually, to be able to find the subject in prayer, it is advisable to ask some "basic questions" to the verb of the sentence: “who?”, “what?” or “what?”, for example.
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From the example above it is still possible to identify another important part in the parsing: o subject's core. In this case, the core is "the boy”, as this is the one that performs the action of eating the ice cream and not the “my neighborhood”.
In sentence, a subject can be represented by: personal pronouns, nouns, demonstrative pronouns, relative pronouns, interrogative pronouns, indefinite pronouns, numerals, among other classes grammatical.
From the point of view of the direct order of a clause, the subject always appears before the predicate. But, in some cases, it can also appear after or interspersed (in the middle) of the predicate.
See also:meaning of grammatical class.
Types of subjects
simple subject
The subject of a sentence is simple when its nucleus is formed by only one word related to the verb.
compound subject
When there are two or more nuclei of the subject that are related to the verb.
Indeterminate subject
When the subject of the prayer cannot be clearly identified. In this case, as a rule, they accompany verbs in the 3rd person plural (no previous references), verbs in the 3rd person singular accompanied by the particle "if”, and verbs in the impersonal infinitive.
Hidden Subject (or Disinential)
When the subject is not present in the prayer, but can be easily identified by verbal ending or because it has already been referred to in a previous sentence.
non-existent subject
In some cases the subject simply doesn't exist. As a rule, they consist of sentences formed by impersonal verbs and always conjugated in the 3rd person singular.
Impersonal verbs usually indicate atmospheric phenomena and nature (snow, rain, wind, etc.); or the verb to do (indicating elapsed time) and the verb to have (in the sense of elapsed time or existing).
Subject and Predicate
Both are essential parts of a prayer. The subject, as said, consists of the part to which the clause refers, directly agreeing with the verb.
On the other hand, the predicate is the result of what happens to the subject, that is, that informs something about it. It is necessarily formed by a verb or a verbal phrase.
The predicate can be divided into: nominal, verbal and verb-nominal.
see the meaning of definite and indefinite article.