A general idea of analysis was needed in our study of the parts of speech,—­in determining case, subject and predicate, clauses introduced by conjunctions, etc.

[Sidenote:  Value of analysis.]

A more thorough and accurate acquaintance with the subject is necessary for two reasons,—­not only for a correct understanding of the principles of syntax, but for the study of punctuation and other topics treated in rhetoric.

[Sidenote:  Definition.]

336.  A sentence is the expression of a thought in words.

[Sidenote:  Kinds of sentences as to form.]

337.  According to the way in which a thought is put before a listener or reader, sentences may be of three kinds:—­

(1) Declarative, which puts the thought in the form of a declaration or assertion.  This is the most common one.

(2) Interrogative, which puts the thought in a question.

(3) Imperative, which expresses command, entreaty, or request.

Any one of these may be put in the form of an exclamation, but the sentence would still be declarative, interrogative, or imperative; hence, according to form, there are only the three kinds of sentences already named.

Examples of these three kinds are, declarative, “Old year, you must not die!” interrogative, “Hath he not always treasures, always friends?” imperative, “Come to the bridal chamber, Death!”

CLASSIFICATION ACCORDING TO NUMBER OF STATEMENTS.

SIMPLE SENTENCES.

[Sidenote:  Division according to number of statements.]

338.  But the division of sentences most necessary to analysis is the division, not according to the form in which a thought is put, but according to how many statements there are.

The one we shall consider first is the simple sentence.

[Sidenote:  Definition.]

339.  A simple sentence is one which contains a single statement, question, or command:  for example, “The quality of mercy is not strained;” “What wouldst thou do, old man?” “Be thou familiar, but by no means vulgar.”

340.  Every sentence must contain two parts,—­a subject and a predicate.

[Sidenote:  Definition:  Predicate.]

The predicate of a sentence is a verb or verb phrase which says something about the subject.

In order to get a correct definition of the subject, let us examine two specimen sentences:—­

1.  But now all is to be changed.

2.  A rare old plant is the ivy green.

In the first sentence we find the subject by placing the word what before the predicate,—­What is to be changed?  Answer, all.  Consequently, we say all is the subject of the sentence.

But if we try this with the second sentence, we have some trouble,—­What is the ivy green?  Answer, a rare old plant.  But we cannot help seeing that an assertion is made, not of a rare old plant, but about the ivy green; and the real subject is the latter.  Sentences are frequently in this inverted order, especially in poetry; and our definition must be the following, to suit all cases:—­